Which substance has the higher entropy?
(a) A sample of pure silicon (to be used in a computer chip) or a piece of silicon containing a trace of another element such as boron or phosphorus
(b) O₂(g) at 0°C or O₂(g) at −50°C
(c) I₂(s) or I₂(g), both at room temperature
(d) One mole of O₂(g) at 1 bar pressure or one mole of O₂(g) at 0.01 bar pressure (both at 298 K)