The statement that correctly describes the relationship between the volume of a gas and its temperature, in Kelvin, assuming pressure is held constant is "he relationship is directly proportional; as temperature increases, volume increases in the same way."
In mathematics, a direct proportion means that the two variables increase or decrease simultaneously. As one increases the other increases and vice versa.
According to Charles law; the volume of a given mass of gas is directly proportional to its volume at constant pressure.
As a result of this law, the correct statement is option D; The relationship is directly proportional; as temperature increases, volume increases in the same way.
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