Consider a gas enclosed in a cylinder fitted with a piston. If the piston is suddenly pushed in, the temperature of the gas rises, although no heat is supplied to it, only work 15 on It. SHC : dQ/(m x dT) In this case, AQ = O, but AT # 0, hence the specific heat of the gas is zero. On the other hand, if the piston is raised slowly, the volume of the enclosed gas increases slowly and gas is cooled slowly. If the necessary heat energy is supplied from outside such that its temperature remains constant, then AT = 0 but AQ 0. Hence specific heat of the gas becomes infinite. Thus, we conclude that the specific heat of a gas can have any value ranging from zero to-infinity depending on the manner in which it is being heated. The most common specific heats of a gas are: (i) specific heat capacity at constant volume and (1) Sp. heat capacity at constant pressure.
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Consider a gas enclosed in a cylinder fitted with a piston. If the piston is suddenly pushed in, the
temperature of the gas rises, although no heat is supplied to it, only work 15 on It.
SHC : dQ/(m x dT)
In this case, AQ = O, but AT # 0, hence the specific heat of the gas is zero.
On the other hand, if the piston is raised slowly, the volume of the enclosed gas increases slowly
and gas is cooled slowly. If the necessary heat energy is supplied from outside such that its
temperature remains constant, then AT = 0 but AQ 0. Hence specific heat of the gas becomes
infinite.
Thus, we conclude that the specific heat of a gas can have any value ranging from zero to-infinity
depending on the manner in which it is being heated. The most common specific heats of a gas
are: (i) specific heat capacity at constant volume and (1) Sp. heat capacity at constant pressure.
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