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42. A thermally insulated chamber of volume 2v is divided by a frictionless piston of area s into 2 parts a and b. Part a has an ideal gas at pressure p and temperature t and in part b is vacuum. A massless spring of force constant k is connected with piston and wall of container as shown. Initially spring is unstretched. Gas in chamber a is allowed to expand. Let in equilibrium spring is compressed by x. Then which of the following is correct A Final pressure of gas is kx/s B work done by gas is kx2/2 C change in internal energy of gas is kx2/2 D temperature of gas is decreased

Answer» 42. A thermally insulated chamber of volume 2v is divided by a frictionless piston of area s into 2 parts a and b. Part a has an ideal gas at pressure p and temperature t and in part b is vacuum. A massless spring of force constant k is connected with piston and wall of container as shown. Initially spring is unstretched. Gas in chamber a is allowed to expand. Let in equilibrium spring is compressed by x. Then which of the following is correct A Final pressure of gas is kx/s B work done by gas is kx2/2 C change in internal energy of gas is kx2/2 D temperature of gas is decreased


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