The correct option is
D NH4HS(s)→NH3(g)+H2S(g)In the equation,
ΔH=ΔE+ΔngRTΔng=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.