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One mole of a non-ideal gas undergoes a ...

One mole of a non-ideal gas undergoes a change of state `(2.0atm,3.0L,95K)rarr(4.0atm,5.0L,245K)`
With a change in internal energy `DeltaE=30L` atm. The change in enthalpy `(DeltaH)` in the process in `L`-atm is

A

42.3

B

40

C

44

D

not defined, because

Text Solution

Verified by Experts

The correct Answer is:
C
In this process, all the three variables `p,V` and `T` are changing. According to thermodynamics,
`H = U + PV`
`:. H_(1) = U_(1) + P_(1) V_(1)`
and `H_(2) = U_(2) + P_(2) V_(2)`
where the subscripts describe the initial and final states.
`Delta H = H_(2) - H_(1)`
`= (U_(2) + P_(2) V_(2)) - (U_(1) + P_(1) V_(2))`
`(U_(2) + U_(1)) + (P_(2) V_(2) - P_(1) V_(1))`
`30 + (4 xx 5 - 2 xx 3)`
`30 + 14`
`44 L atm`
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