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An office room contains about 2000 ...

An office room contains about 2000 moles of air . The change in the internal energy of this much air when it is cooled from `34 ^@ C ` to `24^@C` at constant pressure of 1.0 atm is
[ Use ` gamm _(" air") = 1.4 ` and universal gas constant `=8.314 J // mol -K]`

A

`-1.9 xx 10^(5) J `

B

`+ 1.9 xx 10^(5)` J

C

`- 4.2 xx 10^(5) `J

D

`+ 0.7 xx 105 J `

Text Solution

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The correct Answer is:
C
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