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One litre of dry air STP undergoes throu...

One litre of dry air STP undergoes through an adiabatic process and reaches to a final temperature of 89.6 °C, the work done by air is : [Take air to be an ideal gas and `gamma_("air")=1.4` use R`=8.3J mol^(-1)K^(-1)]`

A

83J

B

-83J

C

1859.6J

D

-1859.2J

Text Solution

Verified by Experts

The correct Answer is:
B
`W=(nR(T_(1)-T_(2)))/(gamma-1)=((1)/(22.4))xx(8.3(273-(273+89.6)))/((1.4-1))`
`=(-8.3xx89.6)/(22.4xx0.4)`
`=-83J`.
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