JEE Main & Advanced
Chemistry
Thermodynamics / रासायनिक उष्मागतिकी
Question Bank
Heat of reaction
question_answer
\[C(s)+{{O}_{2}}(g)\,\to \,C{{O}_{2}};\,\,\,\,\Delta H=-94\,kcal\] \[CO(g)+\frac{1}{2}{{O}_{2}}(g)\,\to \,C{{O}_{2}};\,\,\,\Delta H=135.2\,kcal\] Then heat of formation of \[CO(g)\] is [DCE 2001]
A) ? 26.4 kcal
B) 41.2 kcal
C) 26.4 kcal
D) ? 229.2 kcal
Correct Answer:
D
Solution :
By (i) ? (ii) : \[C+\frac{1}{2}{{O}_{2}}\to CO;\,\,\,\Delta H=-229.2.\]