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A gas (C(v.m)=(5)/(2)R) behaving ideall...

A gas `(C_(v.m)=(5)/(2)R)` behaving ideally was allowed to expand reversibly and adiabatically from 1 liter to
32 liter . It's initial at temperature was `327^(@)` C . The molar enthalpy changes `("in "J//"mole")` for the process is

A

` 1125 R`

B

`- 575 R`

C

`- 1575 R`

D

None of these

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Verified by Experts

The correct Answer is:
C
`T_(1)V_(1)^(gamma-1) = T_(2) V_(2)^(gamma-1) rArr [(V_(1))/(V_(2))]^(gamma-1)= (T_(2))/(T_(1)) rArr T_(2) = 150 K`
`DeltaH = C_(P) DeltaT =(7)/(2) xx R [150 - 600] = - 1575 R`
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BANSAL-THERMODYNAMICS-Exercise 1
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  13. The change in entrophy of 2 moles of ideal gas upon isothermal exp...

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  15. The enthalpy of tetramerization of X in gas phase (4 X(g) to X(4)(g)...

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  16. Standard enthorpy of X(2), Y(2) and XY(3) are 60,40 and 50 JK^(-1...

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