Certified Hyperbaric Technologist Practice Test

Gay-Lussac's Law specifically addresses the relationship between the pressure and temperature of a gas when the volume is held constant. In the scenario of a gas cylinder heating up, as the temperature of the gas inside the cylinder increases, the kinetic energy of the gas molecules also increases, which leads to an increase in pressure. This relationship demonstrates that, for a given amount of gas at constant volume, the pressure of the gas is directly proportional to its absolute temperature. This law is critical in understanding the behavior of gases under varying temperatures, especially in applications where gas pressure can affect safety, such as in hyperbaric settings or when dealing with pressurized gas cylinders. Thus, the correct choice highlights the essential concept of how temperature changes can lead to alterations in pressure when the volume is fixed.