Which statement is true about the effects of temperature on gas?

The statement that gas expands with increasing temperature is based on the fundamental principles of gas behavior, particularly articulated by Charles's Law. This law indicates that when the temperature of a gas increases, its kinetic energy also increases. As the molecules within the gas move more rapidly, they collide with each other and their container more forcefully. This increased molecular motion causes the gas to occupy a larger volume, resulting in expansion.

In practical terms, this principle can be observed in various scenarios, such as when a balloon is heated. The air inside the balloon heats up, the molecules move faster, and the balloon expands. Similarly, in closed systems, if the temperature rises while the volume remains constant, the pressure of the gas will also increase.

This understanding is essential for applications in various fields, including engineering, meteorology, and any discipline that involves the study of gases and their behaviors under different conditions.