A cylinder of fixed capacity 67.2 litres...

A cylinder of fixed capacity 67.2 litres contains helium gas at STP. The amount of heat needed to rise the temperature of the gas in the cylinder by `20^(@)C` is (R = 8.31 `"Jmol"^(-1)K^(-1)`)

748 J

374 J

1000 J

500 J

Text Solution

Verified by Experts

The correct Answer is:

`d Q = eta c_v dt`
`= 3xx(83.1xx3)/(2)xx20`
`=3 xx 12.465 xx20`
`=747 approx 748 J`.

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