Question

question 4 of 10 an ice cube is placed inside a thermos and the lid is closed and eventually melts. most of the thermal energy that melts it comes from which source? a. the bonds between water molecules b. the air surrounding the thermos c. the liquid water that forms d. water vapor from the air

Explanation:

When an ice - cube melts in a thermos, the energy for melting comes from the latent heat released when water vapor in the air inside the thermos condenses. Water vapor in the air has more energy than the ice. When it changes from the gaseous state to a liquid state (condensation), it releases heat which is used to melt the ice.

Answer:

D. Water vapor from the air