Match Column I and II:

Column I:
(A) Sb(s)
(B) (g)
(C) (g)
(D) (g)

Column II:
(P) ΔfH° = +ve, ΔfS° = +ve
(Q) ΔfH° = 0, ΔfS° = 0
(R) ΔfH° = +ve, ΔfS° = -ve
(S) ΔfH

Question

Match Column I and II:

Column I:
(A) Sb(s)
(B) $O_3$(g)
(C) $I_2$(g)
(D) $CO$(g)

Column II:
(P) ΔfH° = +ve, ΔfS° = +ve
(Q) ΔfH° = 0, ΔfS° = 0
(R) ΔfH° = +ve, ΔfS° = -ve
(S) ΔfH° = -ve, ΔfS° = +ve

Prashant Kotian · Accepted Answer

Correct answer: A→Q; B→R; C→P; D→S. (A) Sb(s) is in its standard reference state (Q).
(B) Ozone () is endothermic with negative entropy of formation relative to oxygen (R).
(C) (g) has positive enthalpy (sublimation) and entropy of formation (P).
(D) (g) is exothermic with positive standard entropy of formation (S).

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