1. Heat Math Worksheet (First Exposure)
Gas
Q = m DH
DHvap
-DHvap
DHcond
DT = Tf - Ti
Liquid
Q = m DT Cp
DHfus
-DHfus
DHsolid
Solid
NOTE: Figure 17.9 on page 520 is in error.
It says “-DHcond and –DHsolid,” but it the minus signs don’t belong there. Either that or I’m a monkey’s uncle.
Init 4/10/2014 by Daniel R. Barnes

2. Heat Math Worksheet (First Exposure)

3. Heat Math Worksheet (First Exposure)

4. Heat Math Worksheet (First Exposure)

5. Heat Math Worksheet (First Exposure)

6. Heat Math Worksheet (First Exposure)

7. Heat Math Worksheet (First Exposure)

8. Heat Math Worksheet (First Exposure)

9. Heat Math Worksheet (First Exposure)

10. Heat Math Worksheet (First Exposure)

11. Heat Math Worksheet (First Exposure)

12. Heat Math Worksheet (First Exposure)

13. Heat Math Worksheet (First Exposure)

14. Heat Math Worksheet (First Exposure)

15. Heat Math Worksheet (First Exposure)

16. Q = m DHvap
100oC
DT = Tf - Ti T
Q = m DT Cp
0oC
Q = m DHfus Q

17. Heat Math Worksheet (First Exposure)

18. Heat Math Worksheet (First Exposure)

19. Heat Math Worksheet (First Exposure)

20. Heat Math Worksheet (First Exposure)

21. Heat Math Worksheet (First Exposure)

22. Heat Math Worksheet (First Exposure)

23. Heat Math Worksheet (First Exposure)

24. Heat Math Worksheet (First Exposure)

25. Heat Math Worksheet (First Exposure)

26. Heat Math Worksheet (First Exposure)

27. Heat Math Worksheet (First Exposure)

28. Heat Math Worksheet (First Exposure)

29. SWBAT . . . (Solving for T) . . . solve q = m DT Cp problems
17. A corn cob is heated up in boiling water to a temperature of 100 oC. The corn cob has a mass of 400 g and absorbed 16,000 cal of heat from the boiling water. What was the original temperature of the corn cob? Assume that the specific heat of the corn cob is 1 cal/goC.
Tf = 100 oC
m = 400 g
q = 16,000 cal
Ti = ? oC
Cp = 1 cal/goC
DT = Tf – Ti = ?
Ti = Tf – DT
q = m DT Cp
q = m DT Cp
16,000 cal
DT =
= 40 oC = DT
m Cp
m Cp
(400 g)
(1 cal/goC)
SKIP TO ANSWER
Ti = Tf – DT
= 100 oC – 40 oC
= 60 oC = Ti

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