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.

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.

the small 0.38-kg slider is known to move from position a to position b along the vertical-plane slot. determine (a) the work done on the body by its weight and (b) the work done on the body by the spring. the distance r = 0.70 m, the spring modulus k = 154 n/m, and the unstretched length of the spring is 0.53 m

explanation:

-reverse card

it is a negative acceleration