Question #e6ed5

1 Answer
Kemoy R.
Oct 4, 2017

Increase in temperature causes an increase in internal energy.

Explanation:

As a substance is heated, the kinetic energy of the particles within that substance increases causing them to move faster and further apart. As temperature reaches melting point (for a solid) or boiling point (for a liquid) the thermal energy is used to break the molecular bonds instead of further increase in kinetic energy. At this point where there is no change in temperature (latent heat) because of the heat being used up, a state change occurs. This is why there are flat portions on a heating curve.

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