In Which One of These Pairs Will the Entropy of the First

Multiple Choice

In which one of these pairs will the entropy of the first substance be greater than that of the second? Assume P and T are the same for each pair, unless stated otherwise.

A) 1 mole of F ₂( g) ; 1 mole of Cl ₂( g)
B) 1 mole of I ₂( s) ; 1 mole of I ₂( g)
C) 1 mole of CaCO ₃( s) ; 1 mole of CaO( s) plus 1 mole of CO ₂( g)
D) 1 mole of H ₂( g) at 25°C; 1 mole of H ₂( g) at 50°C
E) 1 mole of O ₃( g) ; 1 mole of O ₂( g)