1. Energy Calculations
PRACTICE PROBLEM #1:
A large, natural gas-fired electrical power facility produces
15 million kilowatt-hours of electricity each day it operates.
The power plant requires an input of 13,000 BTUs of heat
to produce 1 kilowatt-hour of electricity. One cubic foot of
natural gas supplies 1,000 BTUs of heat energy.

2. Energy Calculations
PRACTICE PROBLEM #1:
A large, natural gas-fired electrical power facility produces
15 million kilowatt-hours of electricity each day it operates.
The power plant requires an input of 13,000 BTUs of heat
to produce 1 kilowatt-hour of electricity. One cubic foot of
natural gas supplies 1,000 BTUs of heat energy.
1. Showing all steps in your calculations, determine the

3. Energy Calculations
PRACTICE PROBLEM #1:
A large, natural gas-fired electrical power facility produces
15 million kilowatt-hours of electricity each day it operates.
The power plant requires an input of 13,000 BTUs of heat
to produce 1 kilowatt-hour of electricity. One cubic foot of
natural gas supplies 1,000 BTUs of heat energy.
1. Showing all steps in your calculations, determine the
(a) BTUs needed to generate the electricity produced
by the power plant in 24 hours.

4. Energy Calculations
PRACTICE PROBLEM #1:
A large, natural gas-fired electrical power facility produces
15 million kilowatt-hours of electricity each day it operates.
The power plant requires an input of 13,000 BTUs of heat
to produce 1 kilowatt-hour of electricity. One cubic foot of
natural gas supplies 1,000 BTUs of heat energy.
1. Showing all steps in your calculations, determine the
(a) BTUs needed to generate the electricity produced
by the power plant in 24 hours.
(b) Cubic feet of natural gas consumed by the power
plant each hour.

5. Energy Calculations
PRACTICE PROBLEM #1:
A large, natural gas-fired electrical power facility produces
15 million kilowatt-hours of electricity each day it operates.
The power plant requires an input of 13,000 BTUs of heat
to produce 1 kilowatt-hour of electricity. One cubic foot of
natural gas supplies 1,000 BTUs of heat energy.
1. Showing all steps in your calculations, determine the
(c) Cubic feet of carbon dioxide gas released by the
power plant each day. Assume that methane
combusts with oxygen to produce only carbon
dioxide and water vapor and that the pressures
and temperatures are kept constant.

6. Energy Calculations
PRACTICE PROBLEM #1:
A large, natural gas-fired electrical power facility produces
15 million kilowatt-hours of electricity each day it operates.
The power plant requires an input of 13,000 BTUs of heat
to produce 1 kilowatt-hour of electricity. One cubic foot of
natural gas supplies 1,000 BTUs of heat energy.
1. Showing all steps in your calculations, determine the
(d) Gross profit per year for the power company.
The power company is able to sell electricity
at $50 per 500 kW-h. They pay a wholesale
price of $5.00 per 1,000 cubic feet of natural
gas.

7. Energy Calculations
PRACTICE PROBLEM #1:
A large, natural gas-fired electrical power facility produces
15 million kilowatt-hours of electricity each day it operates.
The power plant requires an input of 13,000 BTUs of heat
to produce 1 kilowatt-hour of electricity. One cubic foot of
natural gas supplies 1,000 BTUs of heat energy.
What environmental effect might the production of
electricity through the burning of natural gas pose?

8. Energy Calculations
PRACTICE PROBLEM #1:
A large, natural gas-fired electrical power facility produces
15 million kilowatt-hours of electricity each day it operates.
The power plant requires an input of 13,000 BTUs of heat
to produce 1 kilowatt-hour of electricity. One cubic foot of
natural gas supplies 1,000 BTUs of heat energy.
What’s the important information?

9. Energy Calculations
PRACTICE PROBLEM #1:
A large, natural gas-fired electrical power facility produces
15 million kilowatt-hours of electricity each day it operates.
The power plant requires an input of 13,000 BTUs of heat
to produce 1 kilowatt-hour of electricity. One cubic foot of
natural gas supplies 1,000 BTUs of heat energy.
What’s the important information?
natural gas

10. Energy Calculations
PRACTICE PROBLEM #1:
A large, natural gas-fired electrical power facility produces
15 million kilowatt-hours of electricity each day it operates.
The power plant requires an input of 13,000 BTUs of heat
to produce 1 kilowatt-hour of electricity. One cubic foot of
natural gas supplies 1,000 BTUs of heat energy.
What’s the important information?
natural gas
15 million kW-h per day

11. Energy Calculations
PRACTICE PROBLEM #1:
A large, natural gas-fired electrical power facility produces
15 million kilowatt-hours of electricity each day it operates.
The power plant requires an input of 13,000 BTUs of heat
to produce 1 kilowatt-hour of electricity. One cubic foot of
natural gas supplies 1,000 BTUs of heat energy.
What’s the important information?
natural gas
15 million kW-h per day =1.5 x 107 kW-h/day

12. Energy Calculations
PRACTICE PROBLEM #1:
A large, natural gas-fired electrical power facility produces
15 million kilowatt-hours of electricity each day it operates.
The power plant requires an input of 13,000 BTUs of heat
to produce 1 kilowatt-hour of electricity. One cubic foot of
natural gas supplies 1,000 BTUs of heat energy.
What’s the important information?
natural gas
15 million kW-h per day =1.5 x 107 kW-h/day
13,000 BTUs per 1 kW-h

13. Energy Calculations
PRACTICE PROBLEM #1:
A large, natural gas-fired electrical power facility produces
15 million kilowatt-hours of electricity each day it operates.
The power plant requires an input of 13,000 BTUs of heat
to produce 1 kilowatt-hour of electricity. One cubic foot of
natural gas supplies 1,000 BTUs of heat energy.
What’s the important information?
natural gas
15 million kW-h per day =1.5 x 107 kW-h/day
13,000 BTUs per 1 kW-h =1.3 x 104 BTUs/1 kW-h

14. Energy Calculations
PRACTICE PROBLEM #1:
A large, natural gas-fired electrical power facility produces
15 million kilowatt-hours of electricity each day it operates.
The power plant requires an input of 13,000 BTUs of heat
to produce 1 kilowatt-hour of electricity. One cubic foot of
natural gas supplies 1,000 BTUs of heat energy.
What’s the important information?
natural gas
15 million kW-h per day =1.5 x 107 kW-h/day
13,000 BTUs per 1 kW-h =1.3 x 104 BTUs/1 kW-h
1.0 ft3 of natural gas per 1,000 BTUs

15. Energy Calculations
PRACTICE PROBLEM #1:
A large, natural gas-fired electrical power facility produces
15 million kilowatt-hours of electricity each day it operates.
The power plant requires an input of 13,000 BTUs of heat
to produce 1 kilowatt-hour of electricity. One cubic foot of
natural gas supplies 1,000 BTUs of heat energy.
What’s the important information?
natural gas
15 million kW-h per day =1.5 x 107 kW-h/day
13,000 BTUs per 1 kW-h =1.3 x 104 BTUs/1 kW-h
1.0 ft3 of natural gas per 1,000 BTUs
=1.0 ft3/1.0 x 103 BTUs

16. What’s the important information?
natural gas
15 million kW-h per day =1.5 x 107 kW-h/day
13,000 BTUs per 1 kW-h =1.3 x 104 BTUs/1 kW-h
1.0 ft3 of natural gas per 1,000 BTUs
=1.0 ft3/1.0 x 103 BTUs
1. Showing all steps in your calculations, determine the
(a) BTUs needed to generate the electricity produced
by the power plant in 24 hours.

17. What’s the important information?
natural gas
15 million kW-h per day =1.5 x 107 kW-h/day
13,000 BTUs per 1 kW-h =1.3 x 104 BTUs/1 kW-h
1.0 ft3 of natural gas per 1,000 BTUs
=1.0 ft3/1.0 x 103 BTUs
1. Showing all steps in your calculations, determine the
(a) BTUs needed to generate the electricity produced
by the power plant in 24 hours.

18. What’s the important information?
natural gas
15 million kW-h per day =1.5 x 107 kW-h/day
13,000 BTUs per 1 kW-h =1.3 x 104 BTUs/1 kW-h
1.0 ft3 of natural gas per 1,000 BTUs
=1.0 ft3/1.0 x 103 BTUs
1. Showing all steps in your calculations, determine the
(a) BTUs needed to generate the electricity produced
by the power plant in 24 hours.
24 hours = 1 day

19. What’s the important information?
natural gas
15 million kW-h per day =1.5 x 107 kW-h/day
13,000 BTUs per 1 kW-h =1.3 x 104 BTUs/1 kW-h
1.0 ft3 of natural gas per 1,000 BTUs
=1.0 ft3/1.0 x 103 BTUs
1. Showing all steps in your calculations, determine the
(a) BTUs needed to generate the electricity produced
by the power plant in 24 hours.
24 hours = 1 day
1.5 x 107 kW-h/day x

20. What’s the important information?
natural gas
15 million kW-h per day =1.5 x 107 kW-h/day
13,000 BTUs per 1 kW-h =1.3 x 104 BTUs/1 kW-h
1.0 ft3 of natural gas per 1,000 BTUs
=1.0 ft3/1.0 x 103 BTUs
1. Showing all steps in your calculations, determine the
(a) BTUs needed to generate the electricity produced
by the power plant in 24 hours.
24 hours = 1 day
1.5 x 107 kW-h/day x 1.3 x 104 BTUs/1 kW-h

21. What’s the important information?
natural gas
15 million kW-h per day =1.5 x 107 kW-h/day
13,000 BTUs per 1 kW-h =1.3 x 104 BTUs/1 kW-h
1.0 ft3 of natural gas per 1,000 BTUs
=1.0 ft3/1.0 x 103 BTUs
1. Showing all steps in your calculations, determine the
(a) BTUs needed to generate the electricity produced
by the power plant in 24 hours.
24 hours = 1 day
1.5 x 107 kW-h/day x 1.3 x 104 BTUs/1 kW-h
= x 1011 BTUs/day

22. What’s the important information?
natural gas
15 million kW-h per day =1.5 x 107 kW-h/day
13,000 BTUs per 1 kW-h =1.3 x 104 BTUs/1 kW-h
1.0 ft3 of natural gas per 1,000 BTUs
=1.0 ft3/1.0 x 103 BTUs
1. Showing all steps in your calculations, determine the
(b) Cubic feet of natural gas consumed by the power
plant each hour.

23. What’s the important information?
natural gas
15 million kW-h per day =1.5 x 107 kW-h/day
13,000 BTUs per 1 kW-h =1.3 x 104 BTUs/1 kW-h
1.0 ft3 of natural gas per 1,000 BTUs
=1.0 ft3/1.0 x 103 BTUs
1. Showing all steps in your calculations, determine the
(b) Cubic feet of natural gas consumed by the power
plant each hour.
FROM PART (a):

24. What’s the important information?
natural gas
15 million kW-h per day =1.5 x 107 kW-h/day
13,000 BTUs per 1 kW-h =1.3 x 104 BTUs/1 kW-h
1.0 ft3 of natural gas per 1,000 BTUs
=1.0 ft3/1.0 x 103 BTUs
1. Showing all steps in your calculations, determine the
(b) Cubic feet of natural gas consumed by the power
plant each hour.
FROM PART (a):
1.95 x 1011 BTUs/day x

25. What’s the important information?
natural gas
15 million kW-h per day =1.5 x 107 kW-h/day
13,000 BTUs per 1 kW-h =1.3 x 104 BTUs/1 kW-h
1.0 ft3 of natural gas per 1,000 BTUs
=1.0 ft3/1.0 x 103 BTUs
1. Showing all steps in your calculations, determine the
(b) Cubic feet of natural gas consumed by the power
plant each hour.
1.95 x 1011 BTUs/day x 1 day/24 hrs x

26. What’s the important information?
natural gas
15 million kW-h per day =1.5 x 107 kW-h/day
13,000 BTUs per 1 kW-h =1.3 x 104 BTUs/1 kW-h
1.0 ft3 of natural gas per 1,000 BTUs
=1.0 ft3/1.0 x 103 BTUs
1. Showing all steps in your calculations, determine the
(b) Cubic feet of natural gas consumed by the power
plant each hour.
1.95 x 1011 BTUs/day x 1 day/24 hrs x 1 ft3/1.0 x 103 BTUs

27. What’s the important information?
natural gas
15 million kW-h per day =1.5 x 107 kW-h/day
13,000 BTUs per 1 kW-h =1.3 x 104 BTUs/1 kW-h
1.0 ft3 of natural gas per 1,000 BTUs
=1.0 ft3/1.0 x 103 BTUs
1. Showing all steps in your calculations, determine the
(b) Cubic feet of natural gas consumed by the power
plant each hour.
1.95 x 1011 BTUs/day x 1 day/24 hrs x 1 ft3/1.0 x 103 BTUs
= x 106 ft3/hr

28. 1. Showing all steps in your calculations, determine the
(c) Cubic feet of carbon dioxide gas released by the
power plant each day. Assume that methane
combusts with oxygen to produce only carbon
dioxide and water vapor and that the pressures
and temperatures are kept constant.

29. 1. Showing all steps in your calculations, determine the
(c) Cubic feet of carbon dioxide gas released by the
power plant each day. Assume that methane
combusts with oxygen to produce only carbon
dioxide and water vapor and that the pressures
and temperatures are kept constant.

30. 1. Showing all steps in your calculations, determine the
(c) Cubic feet of carbon dioxide gas released by the
power plant each day. Assume that methane
combusts with oxygen to produce only carbon
dioxide and water vapor and that the pressures
and temperatures are kept constant.

31. 1. Showing all steps in your calculations, determine the
(c) Cubic feet of carbon dioxide gas released by the
power plant each day. Assume that methane
combusts with oxygen to produce only carbon
dioxide and water vapor and that the pressures
and temperatures are kept constant.
CH4(g) +

32. 1. Showing all steps in your calculations, determine the
(c) Cubic feet of carbon dioxide gas released by the
power plant each day. Assume that methane
combusts with oxygen to produce only carbon
dioxide and water vapor and that the pressures
and temperatures are kept constant.
CH4(g) + O2(g) 

33. 1. Showing all steps in your calculations, determine the
(c) Cubic feet of carbon dioxide gas released by the
power plant each day. Assume that methane
combusts with oxygen to produce only carbon
dioxide and water vapor and that the pressures
and temperatures are kept constant.
CH4(g) + O2(g)  CO2(g) +

34. 1. Showing all steps in your calculations, determine the
(c) Cubic feet of carbon dioxide gas released by the
power plant each day. Assume that methane
combusts with oxygen to produce only carbon
dioxide and water vapor and that the pressures
and temperatures are kept constant.
CH4(g) + O2(g)  CO2(g) H2O(g)

35. 1. Showing all steps in your calculations, determine the
(c) Cubic feet of carbon dioxide gas released by the
power plant each day. Assume that methane
combusts with oxygen to produce only carbon
dioxide and water vapor and that the pressures
and temperatures are kept constant.
CH4(g) + O2(g)  CO2(g) H2O(g)

36. 1. Showing all steps in your calculations, determine the
(c) Cubic feet of carbon dioxide gas released by the
power plant each day. Assume that methane
combusts with oxygen to produce only carbon
dioxide and water vapor and that the pressures
and temperatures are kept constant.
CH4(g) + 2 O2(g)  CO2(g) H2O(g)

37. 1. Showing all steps in your calculations, determine the
(c) Cubic feet of carbon dioxide gas released by the
power plant each day. Assume that methane
combusts with oxygen to produce only carbon
dioxide and water vapor and that the pressures
and temperatures are kept constant.
CH4(g) + 2 O2(g)  CO2(g) H2O(g)
Recall from chemistry:

38. 1. Showing all steps in your calculations, determine the
(c) Cubic feet of carbon dioxide gas released by the
power plant each day. Assume that methane
combusts with oxygen to produce only carbon
dioxide and water vapor and that the pressures
and temperatures are kept constant.
CH4(g) + 2 O2(g)  CO2(g) H2O(g)
Recall from chemistry: when gases react and there is
no change in pressure and temperature, mole
coefficients can be replaced by volumes.

39. 1. Showing all steps in your calculations, determine the
(c) Cubic feet of carbon dioxide gas released by the
power plant each day. Assume that methane
combusts with oxygen to produce only carbon
dioxide and water vapor and that the pressures
and temperatures are kept constant.
CH4(g) + 2 O2(g)  CO2(g) H2O(g)
Recall from chemistry: when gases react and there is
no change in pressure and temperature, mole
coefficients can be replaced by volumes.
FROM PART (b):

40. 1. Showing all steps in your calculations, determine the
(c) Cubic feet of carbon dioxide gas released by the
power plant each day. Assume that methane
combusts with oxygen to produce only carbon
dioxide and water vapor and that the pressures
and temperatures are kept constant.
CH4(g) + 2 O2(g)  CO2(g) H2O(g)
Recall from chemistry: when gases react and there is
no change in pressure and temperature, mole
coefficients can be replaced by volumes.
FROM PART (b):
8.125 x 106 ft3 CH4/hr x

41. 1. Showing all steps in your calculations, determine the
(c) Cubic feet of carbon dioxide gas released by the
power plant each day. Assume that methane
combusts with oxygen to produce only carbon
dioxide and water vapor and that the pressures
and temperatures are kept constant.
CH4(g) + 2 O2(g)  CO2(g) H2O(g)
Recall from chemistry: when gases react and there is
no change in pressure and temperature, mole
coefficients can be replaced by volumes.
8.125 x 106 ft3 CH4/hr x 24 hr/1 day x

42. 1. Showing all steps in your calculations, determine the
(c) Cubic feet of carbon dioxide gas released by the
power plant each day. Assume that methane
combusts with oxygen to produce only carbon
dioxide and water vapor and that the pressures
and temperatures are kept constant.
CH4(g) + 2 O2(g)  CO2(g) H2O(g)
Recall from chemistry: when gases react and there is
no change in pressure and temperature, mole
coefficients can be replaced by volumes.
8.125 x 106 ft3 CH4/hr x 24 hr/1 day x 1 ft3 CO2/1 ft3 CH4

43. 1. Showing all steps in your calculations, determine the
(c) Cubic feet of carbon dioxide gas released by the
power plant each day. Assume that methane
combusts with oxygen to produce only carbon
dioxide and water vapor and that the pressures
and temperatures are kept constant.
CH4(g) + 2 O2(g)  CO2(g) H2O(g)
Recall from chemistry: when gases react and there is
no change in pressure and temperature, mole
coefficients can be replaced by volumes.
8.125 x 106 ft3 CH4/hr x 24 hr/1 day x 1 ft3 CO2/1 ft3 CH4
= x 108 ft3 CO2/day

44. 1. Showing all steps in your calculations, determine the
(d) Gross profit per year for the power company.
The power company is able to sell electricity
at $50 per 500 kW-h. They pay a wholesale
price of $5.00 per 1,000 cubic feet of natural
gas.
What’s the important information?

45. 1. Showing all steps in your calculations, determine the
(d) Gross profit per year for the power company.
The power company is able to sell electricity
at $50 per 500 kW-h. They pay a wholesale
price of $5.00 per 1,000 cubic feet of natural
gas.
What’s the important information?
Customers pay $50 per 500 kW-h

46. 1. Showing all steps in your calculations, determine the
(d) Gross profit per year for the power company.
The power company is able to sell electricity
at $50 per 500 kW-h. They pay a wholesale
price of $5.00 per 1,000 cubic feet of natural
gas.
What’s the important information?
Customers pay $50 per 500 kW-h
Power company pays $5.00 per 1,000 cubic feet of
natural gas

47. 1. Showing all steps in your calculations, determine the
(d) Gross profit per year for the power company.
The power company is able to sell electricity
at $50 per 500 kW-h. They pay a wholesale
price of $5.00 per 1,000 cubic feet of natural
gas.
What’s the important information?
Customers pay $50 per 500 kW-h
Power company pays $5.00 per 1,000 cubic feet of
natural gas = $5.00/1.0 x 103 ft3 CH4

48. 1. Showing all steps in your calculations, determine the
(d) Gross profit per year for the power company.
What’s the important information?
Customers pay $50 per 500 kW-h
Power company pays $5.00 per 1,000 cubic feet of
natural gas = $5.00/1.0 x 103 ft3 CH4
How much does the power company make in one year?

49. 1. Showing all steps in your calculations, determine the
(d) Gross profit per year for the power company.
What’s the important information?
Customers pay $50 per 500 kW-h
Power company pays $5.00 per 1,000 cubic feet of
natural gas = $5.00/1.0 x 103 ft3 CH4
How much does the power company make in one year?
1.5 x 107 kW-h/day x

50. 1. Showing all steps in your calculations, determine the
(d) Gross profit per year for the power company.
What’s the important information?
Customers pay $50 per 500 kW-h
Power company pays $5.00 per 1,000 cubic feet of
natural gas = $5.00/1.0 x 103 ft3 CH4
How much does the power company make in one year?
1.5 x 107 kW-h/day x 365 days/year x

51. 1. Showing all steps in your calculations, determine the
(d) Gross profit per year for the power company.
What’s the important information?
Customers pay $50 per 500 kW-h
Power company pays $5.00 per 1,000 cubic feet of
natural gas = $5.00/1.0 x 103 ft3 CH4
How much does the power company make in one year?
1.5 x 107 kW-h/day x 365 days/year x $50/500 kW-h

52. 1. Showing all steps in your calculations, determine the
(d) Gross profit per year for the power company.
What’s the important information?
Customers pay $50 per 500 kW-h
Power company pays $5.00 per 1,000 cubic feet of
natural gas = $5.00/1.0 x 103 ft3 CH4
How much does the power company make in one year?
1.5 x 107 kW-h/day x 365 days/year x $50/500 kW-h
= $547,500,000 year ($547.5 million)

53. 1. Showing all steps in your calculations, determine the
(d) Gross profit per year for the power company.
What’s the important information?
Customers pay $50 per 500 kW-h
Power company pays $5.00 per 1,000 cubic feet of
natural gas = $5.00/1.0 x 103 ft3 CH4
How much natural gas did the power company use in 1 year?
FROM PART (b):

54. 1. Showing all steps in your calculations, determine the
(d) Gross profit per year for the power company.
What’s the important information?
Customers pay $50 per 500 kW-h
Power company pays $5.00 per 1,000 cubic feet of
natural gas = $5.00/1.0 x 103 ft3 CH4
How much natural gas did the power company use in 1 year?
FROM PART (b):
8.3 x 106 ft3 CH4/hr x

55. 1. Showing all steps in your calculations, determine the
(d) Gross profit per year for the power company.
What’s the important information?
Customers pay $50 per 500 kW-h
Power company pays $5.00 per 1,000 cubic feet of
natural gas = $5.00/1.0 x 103 ft3 CH4
How much natural gas did the power company use in 1 year?
8.3 x 106 ft3 CH4/hr x 24 hrs/day x

56. 1. Showing all steps in your calculations, determine the
(d) Gross profit per year for the power company.
What’s the important information?
Customers pay $50 per 500 kW-h
Power company pays $5.00 per 1,000 cubic feet of
natural gas = $5.00/1.0 x 103 ft3 CH4
How much natural gas did the power company use in 1 year?
8.3 x 106 ft3 CH4/hr x 24 hrs/day x 365 days/year

57. 1. Showing all steps in your calculations, determine the
(d) Gross profit per year for the power company.
What’s the important information?
Customers pay $50 per 500 kW-h
Power company pays $5.00 per 1,000 cubic feet of
natural gas = $5.00/1.0 x 103 ft3 CH4
How much natural gas did the power company use in 1 year?
8.3 x 106 ft3 CH4/hr x 24 hrs/day x 365 days/year
= x 1010 ft3 CH4/year

58. 1. Showing all steps in your calculations, determine the
(d) Gross profit per year for the power company.
What’s the important information?
Customers pay $50 per 500 kW-h
Power company pays $5.00 per 1,000 cubic feet of
natural gas = $5.00/1.0 x 103 ft3 CH4
How much money did the power company spend for 1 year?

59. 1. Showing all steps in your calculations, determine the
(d) Gross profit per year for the power company.
What’s the important information?
Customers pay $50 per 500 kW-h
Power company pays $5.00 per 1,000 cubic feet of
natural gas = $5.00/1.0 x 103 ft3 CH4
How much money did the power company spend for 1 year?
FROM PREVIOUS CALCULATION:

60. 1. Showing all steps in your calculations, determine the
(d) Gross profit per year for the power company.
What’s the important information?
Customers pay $50 per 500 kW-h
Power company pays $5.00 per 1,000 cubic feet of
natural gas = $5.00/1.0 x 103 ft3 CH4
How much money did the power company spend for 1 year?
FROM PREVIOUS CALCULATION:
7.12 x 1010 ft3 CH4/year x

61. 1. Showing all steps in your calculations, determine the
(d) Gross profit per year for the power company.
What’s the important information?
Customers pay $50 per 500 kW-h
Power company pays $5.00 per 1,000 cubic feet of
natural gas = $5.00/1.0 x 103 ft3 CH4
How much money did the power company spend for 1 year?
7.12 x 1010 ft3 CH4/year x $5.00/1.0 x 103 ft3 CH4

62. 1. Showing all steps in your calculations, determine the
(d) Gross profit per year for the power company.
What’s the important information?
Customers pay $50 per 500 kW-h
Power company pays $5.00 per 1,000 cubic feet of
natural gas = $5.00/1.0 x 103 ft3 CH4
How much money did the power company spend for 1 year?
7.12 x 1010 ft3 CH4/year x $5.00/1.0 x 103 ft3 CH4
= $3.56 x 108/year ($356 million)

63. 1. Showing all steps in your calculations, determine the
(d) Gross profit per year for the power company.
What’s the important information?
Customers pay $50 per 500 kW-h
Power company pays $5.00 per 1,000 cubic feet of
natural gas = $5.00/1.0 x 103 ft3 CH4
How much profit did the power company make?

64. 1. Showing all steps in your calculations, determine the
(d) Gross profit per year for the power company.
What’s the important information?
Customers pay $50 per 500 kW-h
Power company pays $5.00 per 1,000 cubic feet of
natural gas = $5.00/1.0 x 103 ft3 CH4
How much profit did the power company make?
$5.475 x 108/year ($550 million) from customers

65. 1. Showing all steps in your calculations, determine the
(d) Gross profit per year for the power company.
What’s the important information?
Customers pay $50 per 500 kW-h
Power company pays $5.00 per 1,000 cubic feet of
natural gas = $5.00/1.0 x 103 ft3 CH4
How much profit did the power company make?
$547,500,000 year from customer
- $356,000,000 year cost of CH4

66. 1. Showing all steps in your calculations, determine the
(d) Gross profit per year for the power company.
What’s the important information?
Customers pay $50 per 500 kW-h
Power company pays $5.00 per 1,000 cubic feet of
natural gas = $5.00/1.0 x 103 ft3 CH4
How much profit did the power company make?
$5.475 x 108/year ($550 million) from customers
- $3.56 x 108/year ($370 million) cost of CH4
$1.92 x 108/year ($192 million) profit

67. What environmental effect might the production of
electricity through the burning of natural gas pose?