Associate Safety Professional Practice Exam

Which law indicates that gases behave consistently with temperature changes?

1. Boyle's Law

2. Charles Law

3. Avogadro's Law

4. Gay-Lussac's Law

The correct answer is: Charles Law

The correct answer is based on Charles' Law, which specifically describes how gases expand when heated and contract when cooled, provided that the pressure remains constant. This law states that the volume of a gas is directly proportional to its absolute temperature (measured in Kelvin). In simpler terms, as the temperature of a gas increases, its volume increases, and conversely, as the temperature decreases, so does its volume, assuming the pressure does not change. This principle is essential in various applications, such as understanding weather patterns, designing heating systems, and even in scientific research involving gas behaviors under different temperature conditions. Charles' Law serves to underline the predictable nature of gases in response to temperature changes, which is a crucial concept in both chemistry and physics. The other laws mentioned address different relationships among gases. Boyle's Law discusses the relationship between pressure and volume, Avogadro's Law pertains to the relationship between the volume of a gas and the number of moles, and Gay-Lussac's Law focuses on the relationship between pressure and temperature. Each law is significant in its context, but they do not directly address the volume change associated with temperature changes as Charles' Law does.