States of Matter
Heating Curve Calculation
144.29 g of pentane vapor at 117 °C is cooled
to completely solid at -84 °C.
Heating Curve Data for Pentane
Boiling Point (°C)
Melting Point (°C)
AHp (kJ/mol)
vap
AHfus (kJ/mol)
Specific Heat, gas (J/mol K)
Specific Heat, liquid (J/mol K)
117
-84
45.3
9.3
120
168
How much heat is released
from the system as the
pentane cools?
A 157 kJ
B. 177 kJ
C. 67600 kJ
D. 67.5 kJ