Chemical Thermodynamics Question 275
Question: The heat of formation of methane $ C(s)+2H_2(g),\to ,CH_4(g) $ at constant pressure is 18500 cal at $ 25^{o}C $ . The heat of reaction at constant volume would be [MH CET 2000]
Options:
A) 17904 cal
B) 18202 cal
C) 18798 cal
D) 19096 cal
Show Answer
Answer:
Correct Answer: D
Solution:
$ \Delta H=18500=\Delta E+\Delta nRT $ or $ 18500=\Delta E+(-1)\times 2\times 298=19096,cal $ .
