What does Charles' Law state regarding the relationship between gas volume and temperature?

Charles' Law describes the direct relationship between the volume of a gas and its temperature when the pressure remains constant. Specifically, it states that the volume of a fixed amount of gas is directly proportional to its absolute temperature measured in Kelvin. This means that as the temperature increases, so does the volume of the gas, and conversely, if the temperature decreases, the volume also decreases.

This principle is crucial in understanding gas behavior, particularly in various engineering applications. For instance, when heating a gas in a closed container, an increase in temperature will lead to an increase in the gas volume, demonstrating this direct relationship. It's essential when considering systems involving gases, as it helps predict how changes in temperature will affect the system's performance.

The other options misconstrue the principles surrounding gas properties. For example, the relationship described in the second option suggests an inverse relationship, which is not applicable in Charles' Law. The first option refers to pressure, which is relevant to Boyle's Law instead, while the last option incorrectly asserts that volume is independent of temperature and pressure, which contradicts both Charles' and Boyle's Laws. Thus, the identification of the correct relationship in option C is fundamental for accurate applications in environmental engineering and gas behavior calculations.