**CHM
2045C Module Seven Sample Exam **

**Module
Seven Part C: Specific Heat/First Law Problems 10 points**

**If the temperature of a 50.0 gram block of
aluminum increases by 10.9 K when heated by 500 joules, calculate the:**

*heat**capacity of the aluminum block.*

*molar**heat capacity of aluminum.*

*specific*.*heat capacity of aluminum*

**If the internal energy of a thermodynamic
system is decreased by 300 when 75 J of work is done
on the system, how much heat was transferred, and in which direction, to or
from the system**

Answers:

a.
heat capacity of the aluminum block = 45.9 J/K

b.
molar heat capacity of aluminum 24.8 J/K mol

c. specific heat capacity of aluminum =
0.917 J/Kg

-375 J was transferred From the system