38.
The heat of reaction 1⁄2 H2 + 1⁄2 Cl2 ------>HCI at 27 C is – 22.1 kcal. Calculate the heat of reaction at 770C. The molar heat capacities at constant pressure at 270C for hydrogen, chlorine and HCl are 6.82, 7.70 and 6.80 cal mol-1 respectively.
A:
-27.832 kcal
B:
-26.231 kcal
C:
-22.123 kcal
D:
-21.978 kcal
The answer is:
C
