1. 200 300 400 500 100 200 300 400 500 100 200 300 400 500 100 200 300 400 500 100 200 300 400 500 100 Heat, Work, and Internal Energy Thermodynamic Processes Odds and Ends Definitions Laws Of Thermodynamics

2. When work transfers energy to a substance, does internal energy increase or decrease?

3. Increase

4. The internal energy of a substance or combination of a substance has been treated as a single quality to which added or from which energy is taken away. What is this combination of substances called?

5. A system

6. The ________ is the surroundings with which the system interacts.

7. Environment

8. Energy Transferred as heat turns water into steam. Energy from the steam does ______ against the force exerted by air _______ the balloon.

9. Work, Outside

10. G: A= 0.020 m 2 d= 0.050m P= 7.5 x 10 5 Pa= 7.5 x 10 5 N/m U: ΔV=? W=? ΔV= Ad W=PΔV

11. ΔV= W=

12. The Symbol for internal energy is _____.

13. U

14. A thermodynamic process that takes place at constant volume so that no work is done on by the system.

15. What is the isovolumetric process?

16. A thermodynamic process that takes place at constant temp. and in which the internal energy of a system remains unchanged.

17. What is the isothermal process?

18. A thermodynamic process during which work is done on or by the system but no energy is transferred to or from the system as heat.

19. What is the adiabatic process?

20. “Iso”, as in isovolmic, means_______.

21. Constant

22. mgh + work

23. What does W equal?

24. On the highest point of the roller coaster the _______ is the highest.

25. P.E.

26. Idea of ordered energy tending to disordered energy is embodied.

27. What is entropy?

28. Disorder ______, then entropy _______.

29. Increase, Increase

30. Any chemical reaction that _______ the number of gas molecules also increases entropy.

31. Increases

32. Study of heat- it’s transformation

33. What is thermodynamics?

34. The limit of temperature.

35. What is absolute zero?

36. Law of energy conservation is applied to thermal system

37. What’s the first law of thermodynamics?

38. Process of compression or expansion of a gas so that no heat enters or leaves a system.

39. What is adiabatic?

40. Heat will never flow from a cold object to a hot object.

41. What is the 2 nd law of thermodynamics?

42. If work is put into a heat engine, the flow of energy may go from a ____ temperature to a -_____ temperature place, as in a refrigerator or conditioner.

43. Low, High

44. Ideal efficiency of a heat engine

45. What is Carnot efficiency?

46. Some amount of energy in a reaction is always ____ to _____.

47. Lost, Heat

48. Scientists use the formula  S =  Q / T. S is the entropy value, Q is the measure of _____, and T is the temperature of the system measured in _____.

49. Heat, Kelvin

50. Ideal Efficiency= (T hot -T cold )/T hot When the hot reservoir in a steam turbine is 500k and the sink is 400k, what is the ideal efficiency?

51. (500-400)/500=1/5