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Question

For which of the following reactions, ΔH=ΔE+2RT?


A
N2(g)+3H2(g)2NH3(g)
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B
N2(g)+O2(g)2NO(g)
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C
NH4HS(s)NH3(g)+H2S(g)
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D
PCl5(g)PCl3(g)+Cl2(g)
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Solution

The correct option is D NH4HS(s)NH3(g)+H2S(g)
In the equation, ΔH=ΔE+ΔngRT
Δng=2 for the required reaction
A) N2(g)+3H2(g)2NH3(g)
Δng=2
B) N2(g)+O2(g)2NO(g)
Δng=0
C) NH4HS(s)NH3(g)+H2S(g)
Δng=2
D) PCl5(g)PCl3(g)+Cl2(g)
Δng=1
So, NH4HS(s)NH3(g)+H2S(g) is the answer.

Option C is correct.

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