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 $ .



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