Question

Which of the following statements is true?

a. The boiling and condensation points of a substance are the same.
b. The melting and boiling points of a substance are the same.
c. The freezing and boiling points of a substance are the same.
d. The heat of fusion for a substance is the energy required to change from the vapor to plasma phase.

Answer 1

The best answer is C.

Answer 2

Answer:

A. The boiling and condensation points of a substance are the same

Explanation:

The boiling point of a substance is the temperature at which it changes from liquid to gas while the point at which a substance changes from gas to liquid is called its condensation point. As long as a substance is pure, it condenses at the same point at which it boils.

Pure water for example has a condensation point and boiling point of 100 degrees Celsius.