Question

The normal boiling point occurs when the Group of answer choices vapor pressure of a pure liquid equals an external pressure of one atmosphere. vapor pressure of the liquid equals the external pressure. temperature of the pure liquid equals the external temperature. intermolecular forces within the liquid phase are broken.

Answer 1

A. vapor pressure of a pure liquid equals an external pressure of one atmosphere.

Step-by-step explanation:

Boiling point of a chemical substance can be defined as the specific temperature in which the vapor pressure of a liquid is equal to the atmospheric pressure around the liquid and as a result causing the liquid to transform into a vapor.

The normal boiling point occurs when the vapor pressure of a pure liquid equals an external pressure of one atmosphere (1 bar) and thus, causing bubbles of vapor to form.