Match the following:

Column I (Reaction):
(A) (g) + (g) → 2(g)
(B) 2(g) + (g) → 2(g)
(C) (g) + (s) → 2(g)
(D) (g) + 3(g) → 2(g)

Column II (Relation):
(P) ΔH = ΔU + RT
(

Question

Match the following:

Column I (Reaction):
(A) $H_2$(g) + $Cl_2$(g) → 2$HCl$(g)
(B) 2$N_2O$(g) + $O_2$(g) → 2$NO_2$(g)
(C) $H_2$(g) + $I_2$(s) → 2$HI$(g)
(D) $N_2$(g) + 3$H_2$(g) → 2$NH_3$(g)

Column II (Relation):
(P) ΔH = ΔU + RT
(Q) ΔH = ΔU
(R) ΔH = ΔU - 2RT
(S) ΔH = ΔU - RT

Prashant Kotian · Accepted Answer

Correct answer: A→Q; B→S; C→P; D→R. Evaluated using ΔH = ΔU + Δng × R × T:
(A) Δng = 0 → ΔH = ΔU (Q).
(B) Δng = -1 → ΔH = ΔU - RT (S).
(C) Δng = +1 (as is solid) → ΔH = ΔU + RT (P).
(D) Δng = -2 → ΔH = ΔU - 2RT (R).

💡 Solution & Explanation

Practice 22,000+ questions like this