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Q.1 mole of a non-ideal gas undergoes a change of state(2 atm, 3 L, 95 K) to (4 atm, 5...

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user8235304 | Student, Grade 11 | Valedictorian

Posted August 5, 2013 at 5:17 PM via web

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Q.1 mole of a non-ideal gas undergoes a change of state(2 atm, 3 L, 95 K) to (4 atm, 5 L, 245 K) with a change in internal energy of 30 L atm. Find dH of the process in L atm?

a) 40

b) 42.3

c) 44.0

d) none of these

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llltkl | College Teacher | Valedictorian

Posted August 6, 2013 at 7:13 AM (Answer #1)

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From the first law of thermodynamics it follows that,

`H=U+PV`

`rArr DeltaH=DeltaU+Delta(PV)`

Here,

`DeltaU=30 L-atm`

`Delta(PV)=(P_2V_2-P_1V_1)=(4*5-2*3)=14 L-atm`

Therefore,

`DeltaH=(30+14), i.e. 44` L-atm

Hence, Option C) has the correct answer.

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