Introduction to Entropy Practice Test

At 1 atm, liquid nitrogen, N$_2$(l), warms and boils to form N$_2$(g) in an open container. Considering the nitrogen as the system during boiling (liquid to gas), does entropy increase, decrease, or remain approximately constant?

Molten (liquid) sodium chloride is cooled until it solidifies to NaCl(s) in a closed crucible. Considering only the phase change from liquid to solid for the system, does entropy increase, decrease, or remain approximately constant?