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Question

Column-1 represents the process
Column-2 represents the ΔU for that process and
Column-3 represents the work done expression for that process.
Column I Column 2 Column 3(I)Adiabatic expansion(i)0(P)w=q(II)Irreversible isothermal compression(ii)Positive(Q)w=q(III)Reversible isothermal compression(iii)Negative(R)w=0(IV)Free expansion(iv)q(S)w=ΔU
Which set correctly describes the process, when a pressure of 10 atm is applied on a gas container containing gas at 1 atm pressure at a constant temperature of 300K?

A
(II) (i) (R)
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B
(II) (ii) (P)
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C
(III) (i) (Q)
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D
(II) (i) (Q)
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Solution

The correct option is D (II) (i) (Q)

The given process is an irreversible isothermal compression.
Since, the process is isothermal
ΔU=0
So, from I law
ΔU=q+w
q=w
or w=q


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