What is the relationship between the internal energy of a substance and its state of matter?

Question

Responses
A As a gas loses internal energy it becomes a plasma.As a gas loses internal energy it becomes a plasma.
B Closer packed atoms generally have more internal energy.Closer packed atoms generally have more internal energy.
C As the internal energy decreases a substance will spread further apart.As the internal energy decreases a substance will spread further apart.
D As the internal energy increases a substance would go from solid to a liquid.

Answer 1

D The internal energy of a substance increases as it goes from a solid to a liquid state.