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The temperature of an open room of ...

The temperature of an open room of volume `30 m^(3) ` increases from `17 ^(@)C` to `27 ^(@)C` due to the sunshine . The atmosheric pressure in the room remains `1xx 10 ^(5) ` Pa . If ` n_(i) and n_(f)` are the number of molecules in the room beforce and after heating then ` n_(f) - n_(i) ` will be

A

`-1.61 xx10 ^(23)`

B

`1.38 xx10 ^(23)`

C

`2.5 xx 10^(25)`

D

`-2.5 xx 10^(25)`

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