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A certain mass of gas expanded from ( 1L...

A certain mass of gas expanded from ( 1L, 10 atm) to (4 L, 5 atm) against a constant external pressure of 1 atm. If initial temperature of gas is 300 K and the heat capacity of process is `50 J//^(@)C`. Then the enthalpy change during the process is :
(`1"L" "atm" underline ~ 100 J`)

A

`DeltaH=15 kJ`

B

`DeltaH=15.7 kJ`

C

`DeltaH=14.4 kJ`

D

`DeltaH=14.7 kJ`

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The correct Answer is:
D
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