In Which One of the Following Pairs Will the First

Multiple Choice

In which one of the following pairs will the first system have a higher entropy than the second? Assume P and T are the same for each pair, unless stated otherwise.

A) 1 mole He( g) ; 1 mole Kr( g)
B) 1 mole O ₂( g) ; 2 mole O( g)
C) 1 mole CH ₄( g) ; 1 mole C ₂H ₆( g)
D) 1 mole Xe( g) at 1 atmosphere; 1 mole Xe( g) at 0.5 atmosphere
E) 20 one-dollar bills distributed randomly among 20 people; 20 one-dollar bills distributed randomly among 10 people