<P> This law describes how a gas expands as the temperature increases; conversely, a decrease in temperature will lead to a decrease in volume . For comparing the same substance under two different sets of conditions, the law can be written as: </P> <Dl> <Dd> V 1 T 1 = V 2 T 2 or V 2 V 1 = T 2 T 1 or V 1 T 2 = V 2 T 1 . (\ displaystyle (\ frac (V_ (1)) (T_ (1))) = (\ frac (V_ (2)) (T_ (2))) \ qquad (\ text (or)) \ qquad (\ frac (V_ (2)) (V_ (1))) = (\ frac (T_ (2)) (T_ (1))) \ qquad (\ text (or)) \ qquad V_ (1) T_ (2) = V_ (2) T_ (1).) </Dd> </Dl> <Dd> V 1 T 1 = V 2 T 2 or V 2 V 1 = T 2 T 1 or V 1 T 2 = V 2 T 1 . (\ displaystyle (\ frac (V_ (1)) (T_ (1))) = (\ frac (V_ (2)) (T_ (2))) \ qquad (\ text (or)) \ qquad (\ frac (V_ (2)) (V_ (1))) = (\ frac (T_ (2)) (T_ (1))) \ qquad (\ text (or)) \ qquad V_ (1) T_ (2) = V_ (2) T_ (1).) </Dd> <P> The equation shows that, as absolute temperature increases, the volume of the gas also increases in proportion . </P>

Who proposed a model for a gas for the kinetic theory of gases