JEE Main & Advanced
Chemistry
Thermodynamics / रासायनिक उष्मागतिकी
Question Bank
First law of thermodynamics and Hess law
question_answer
For the reaction \[C{{H}_{3}}COOH(l)+2{{O}_{2}}(g)\] ⇌ \[2C{{O}_{2}}(g)+2{{H}_{2}}O(l)\] at \[{{25}^{o}}C\] and 1 atm. pressure, \[\Delta H=-874\,kJ.\] Then the change in internal energy \[(\Delta E)\] is ?. [Orissa JEE 2002]
A) ? 874 kJ
B) ? 871.53 kJ
C) ? 876.47 kJ
D) + 874 kJ
Correct Answer:
A
Solution :
For this reaction \[\Delta n=0\]than \[\Delta E=\Delta H.\]