When the liquid phase of a particular substance evaporates, what happens to the temp of the substance?

Answer 1

If a liquid evaporates it requires energy which would lower the temperature.

Mark

Answer 2

It decreases because less energy is in the liquid; the higher energy molecule has left. This has to do with latent heat and enthalpy/entropy in thermodynamics.

Evaporation is the molecules of higher energy overcoming the surface tension of the liquid, due to their higher energy. Evaporative cooling is the result of energy being transferred from the evaporating media (air usually) to the liquid when the phase change is accomplished. This is how "swamp coolers" work.

One is trading air temperature for relative humidity with these devices; taking 100°F air at 10% relative humidity, and making 80°F air at 50% relative humidity out of it (this is why you see swamp coolers in the desert, but not in Louisiana).

Answer 3

It the two heats up or cools down. Oxygen solidifies at ?361.80 two °F. Hydrogen solidifies at ?434.40 5?°F. the two areas Hydrogen and a million section Oxygen molecule freezes or soilidifies at 32 °F. The factor Xenon solidifies each and every time this is heated above -162.sixty two °F. -162.sixty two °F is Xenons melting element and Xenons boiling element is -169.a million °F

Answer 4

The temperature goes down.