Question

7. Which phase changes require a gain of energy (heat)?

a. melting and freezing
b. sublimation and vaporization
c. vaporization and condensation
d. sublimation and deposition

Answer 1

C.

Step-by-step explanation:

When there is heat the water turns into vapour if not covered but will turn back to water if covered (condensation)

Answer 2

c

Step-by-step explanation: