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  4. Suppose a gas obeys p V2= constant in addition to the gas equation p V=R T. If on heating temperature is doubled, what will be the percentage change in volume ?

Q. Suppose a gas obeys constant in addition to the gas equation . If on heating temperature is doubled, what will be the percentage change in volume ?

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Solution:

constant it implies on using gas law we have constant so if we double the temperature, volume will decrease to

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5. An ideal monoatomic gas is confined in a cylinder by a spring loaded piston of cros section . Initially the gas is at 300K and occupies a volume of and the spring is in its relaxed state as shown in figure. The gas is heated by a small heater until the piston moves out slowly by . The force constant of the spring is and the atmospheric pressure is . The cylinder and the piston are thermally insulated. The piston and the spring are massless and there is no friction between the piston and the cylinder. The final temperature of the gas will be :
(Neglect the heat loss through the lead wires of the heater. The heat capacity of the heater coil is also negligible)

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