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How does Charlesās law describe the relationship between gas volume and temperature?
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Charlesās law describes the relationship between the volume and temperature of a fixed amount of gas under constant pressure. It states that the volume occupied by the gas is directly proportional to its absolute temperature.12
This means that as the temperature of a gas increases, its volume also increases, provided the pressure remains unchanged. Conversely, a decrease in temperature results in a proportional decrease in volume. This empirical relationship is a special case of the ideal gas law and is fundamental to understanding the thermal expansion of gases.21