I think it's physical change
As you increase in elevation, there is less air above you thus the pressure decreases. As the pressure decreases, air molecules spread out further (i.e. air expands) and the temperature decreases. If the humidity is at 100 percent (because it's snowing), the temperature decreases more slowly with height.
Answer:
Both liquids and gases are fluids = true
Answer:
moles solute = 25.5 / molar mass
moles solute /0.1 Kg = molality
delta T = molality x 1.86
freezing point = 0°C - delta T
