Question 313General Subjects - Assistant Engineer

The correct answer is C) If the pressure remains constant, the volume of a given mass of gas is directly proportional to its temperature. This is correct because Charles' law states that for a fixed mass of an ideal gas kept at constant pressure, the volume is directly proportional to the absolute temperature. As the temperature of the gas increases, the volume also increases proportionally. The other options are incorrect because they do not accurately describe the relationship between temperature, volume, and pressure as defined by Charles' law.