Question:
In which of the following \(\Delta E = \Delta H\)?
In which of the following \(\Delta E = \Delta H\)?
Show Hint
If gaseous moles are same on both sides → \(\Delta E = \Delta H\).
Updated On: Jun 16, 2026
- \(N_2O_4(g) \rightleftharpoons 2NO_2(g)\)
- \(2SO_2(g) + O_2(g) \rightleftharpoons 2SO_3(g)\)
- \(H_2(g) + I_2(g) \rightleftharpoons 2HI(g)\)
- \(H_2(g) + \frac{1}{2}O_2(g) \rightleftharpoons H_2O(l)\)
Show Solution
Verified By Collegedunia
The Correct Option is C
Solution and Explanation
Concept:
\[
\Delta H = \Delta E + \Delta n_g RT
\]
Step 1: Condition.
\(\Delta E = \Delta H\) when \(\Delta n_g = 0\)
Step 2: Check reactions.
(A) \(1 \to 2\) change in moles $\times$
(B) \(3 \to 2\) $\times$
(C) \(2 \to 2\) \checkmark
(D) gas to liquid $\times$
Step 3: Conclusion.
Correct option is (C)
Step 1: Condition.
\(\Delta E = \Delta H\) when \(\Delta n_g = 0\)
Step 2: Check reactions.
(A) \(1 \to 2\) change in moles $\times$
(B) \(3 \to 2\) $\times$
(C) \(2 \to 2\) \checkmark
(D) gas to liquid $\times$
Step 3: Conclusion.
Correct option is (C)
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