National League for Nursing (NLN PAX) Practice Exam

The statement that increased temperature decreases the solubility of gases in liquids is based on fundamental principles of chemistry. As temperature rises, the kinetic energy of the gas molecules increases, which leads to more vigorous motion. This increased kinetic energy allows gas molecules to escape from the liquid more easily. Consequently, as the temperature rises, the ability of the liquid to hold dissolved gas diminishes, resulting in decreased solubility.

This behavior is particularly significant in applications such as carbonated beverages, where CO2 is dissolved in the liquid. When the beverage is served at a colder temperature, the gas remains dissolved. However, as it warms, the solubility decreases, leading to the gas escaping as bubbles.

In contrast, increased temperature can enhance the solubility of solids in liquids due to increased molecular interaction and interaction between solute and solvent. However, this is not the same principle that applies to gases. Thus, understanding these effects is essential in various fields including chemistry, environmental science, and even cooking, as the behavior of gases at different temperatures can impact both processes and outcomes.