A plot of volume (V) versus temperature (T) for a gas at constant pressure is a straight line passing through the origin. The plots at different values of pressure are shown in Fig. 5.1. Which of the following order of pressure is correct for this gas?
CHARLE’S LAW state that the volume of a mass of gas is directly proportional to absolute temperature at constant pressure.
Here in the graph straight line is obtained. Slope lines are different at different temperature. All lines meet at absolute zero temperature (lowest imaginary temperature at which gas are supposed to occupy zero volume), where volume of gas is also zero. The volume temperature graph at different fixed pressure is called isobars.
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