For each degree a volume of air at 0°C is cooled, its pressure

Question

Quizplus · Accepted Answer

This is known as Charles's Law which states that at constant pressure, the volume of a fixed mass and ideal gas is directly proportional to its absolute temperature. Absolute temperature is measured in Kelvin, where 0°C = 273 K. So for every 1 K decrease in temperature, the volume of air decreases by 1/273 of its original volume. This means that the pressure will also decrease by the same ratio, according to the ideal gas law (PV = nRT). Therefore, the correct answer is A, which states that the pressure decreases by 1/273 for each degree of cooling.

For Each Degree a Volume of Air at 0°C Is