Question

2.2.4 quiz: transfer of thermal energy
question 8 of 10
an ice cube is placed inside a thermos and the lid is closed. the ice cube eventually melts. most of the thermal energy that melts the ice comes from which source?
a. the air surrounding the thermos
b. the bonds between water molecules
c. the liquid water that forms
d. water vapor from the air

Explanation:

In a closed - thermos, there is minimal heat transfer with the outside air. The energy to melt the ice comes from the breaking of intermolecular bonds between water molecules in the ice. When these bonds break, the ice changes from solid to liquid.

Answer:

B. The bonds between water molecules