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  4. If 300 ml of a gas at 27? C is cooled to 7? C at constant pressure, then its final volume will be :

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Q. If 300 ml of a gas at 27? C is cooled to 7? C at constant pressure, then its final volume will be :

MGIMS WardhaMGIMS Wardha 2004

Solution:

According to Charle's law at constant pressure $ \frac{{{V}_{1}}}{{{T}_{1}}}=\frac{{{V}_{2}}}{{{T}_{2}}} $ Or $ {{V}_{2}}=\frac{{{V}_{1}}\times {{T}_{2}}}{{{T}_{1}}} $ Or $ {{V}_{2}}=\frac{300\times 280}{300} $ $ =280\text{ }ml $