Two moles of an ideal monoatomic gas at 5 bar and 300 K are expanded irreversibly up to a final pressure of 1 bar and 240 K against an external pressure of 0 .5 bar. The work done by the gas is − xR . The value of ' x ' is (Here ' R ' is ga

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Two moles of an ideal monoatomic gas at 5 bar and 300 K are expanded irreversibly up to a final pressure of 1 bar and 240 K against an external pressure of 0 .5 bar. The work done by the gas is − xR . The value of ' x ' is (Here ' R ' is gas constant)

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Correct answer: 180

W = - p e x t V 2 ⁡ - V 1 = - p e x t n R T 2 P 2 - n R T 1 P 1 W i r r , a d i a = - 0.5 2 × R × 240 1 - 2 × R × 300 5 = - 180 R

Two moles of an ideal monoatomic gas at 5 bar and 300 K are expanded irreversibly up to a final pressure of 1 bar and 240 K against an external pressure of 0 .5 bar. The work done by the gas is − xR . The value of ' x ' is (Here ' R ' is gas constant)

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