Question

Please help, Which phase change is an endothermic change?
A. Condensation B. Vaporization C. Deposition
D. Freezeing I think D but im not to sure

Answer 1

not quite

for a phase change to be endothermic, there must be an increase in the average kinetic energy of the particles

in other words, which phase change requires an increase in energy to occur?

Answer 2

Endothermic reactions require a shift up in a phase! so I would include
endothermic=Melting, Sublimation and vapourization
Exothermic reactions shift down in phase which would include
Exothermic=Freezing, Deposition and condentation

Answer 3

Remember endothermic reactions require head (absorb heat from the surroundings) while exothermic reactions release hear (to the surroundings) thus phase up for endo, and phase down for exo :)

Answer 4

So in answering your question, I would put my money on B.) vapourization