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Q.

The equation of state for a gas is given by PV = nTR + αV where n is the no. of moles and α a positive constant. The initial pressure and temperature of one mole of the gas contained in a cylinder is P0 and T0 respectively. The work done by the gas when its temperature doubles
isobarically will be

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a

PoToRPo+α

b

none of these

c

P0T0RP0-α

d

P0T0R ln 2

answer is A.

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Detailed Solution

W = PV [PV = μRT + αV] 
      Po[μRTPo-α] =  PV = μRT + αT

or V = (μRT)(P-α)

i.e., W = P0RT0P0-α                      [μ = 1]

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