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Q.

A real gas is subjected to an adiabatic process causing a change in state from (3 bar, 50 L, 500K) to (5 bar , 40 L, 600 K) against a constant pressure of 4 bar. The magnitude of enthalpy change for the process is:

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a

1000 j

b

9000 J

c

5000 J

d

4000 J

answer is C.

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Detailed Solution

q=0; ΔU=−4×(40−50)=+40L−barΔH=ΔU+Δ(PV)=+40+50=+90 L-bar =+9000J

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