Question 1
For the freezing of liquid hexane, C
6H
, at a given temperature and pressure,
◦ Δ
H is positive and Δ
S is positive.
◦ Δ
H is positive and Δ
S is negative.
◦ Δ
H is negative and Δ
S is positive.
◦ Δ
H is negative and Δ
S is negative.
Question 2
Which is
not a spontaneous process?
◦ combustion of gasoline to produce carbon dioxide and water
◦ dissolution of powdered punch in water
◦ diffusion of perfume in a room
◦ freezing of water at 3°C