Question

Question #ff19f

Answer 1

Stronger attractive forces results in more energy required to change the state of the substance.

Explanation:

A stronger attractive force between the particles result in a strong bond.

With a strong bond, more energy is required to break it.

In terms of melting/boiling point, you need more heat to transform the substance into another state. This is why metals have such high melting points, compared to a covalent bond with significantly less heat needed.

The same goes for the opposite, freezing and condensation, where the absence of heat is needed in large quantities to freeze/condensate a liquid/gas (respectively).

Hope this helps :)