Which statement correctly defines entropy and has the right example of a process with a positive change in entropy?

Among the following reactions, identify which has an entropy (∆S_sys) greater than zero.

True or False. 1 mol of P₂(g) at 400°C and 0.01 atm has a higher entropy per mole than 1 mol of P₄(g) at 400°C and 0.01 atm 

Arrange the following substances in order of increasing standard molar entropy (S°) 

CO₂(g), C₆H₅OH( g), Xe(g), BH₃(g), Ar(g), 

Which of the following reactions have a positive ΔS_rxn?

A. A(s) + B(g) → C(g)

B. 2 A(g) + B(g) → C(g)

C. 2 A(g) + B(g) → 4 C(g)

D. A(g) + 2 B(g) → C(g)

E. A(g) + B(s) → C(g)

Identify the sign of ΔS_sys and ΔS_surr for the reaction below without doing calculations and identify which temperature condition in which the reaction would be spontaneous

2 C₆H₆(l) + 15 O₂(g) → 12 CO₂(g) + 6 H₂O(l) ΔH°_rxn = -6534 kJ