If $300 ml$ of a gas at ${27^o}C$ is cooled to ${7^o}C$ at constant pressure, then its final volume will be ...... $ml$
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(c) $V \propto T$ at constant pressure
==> $\frac{{{V_1}}}{{{V_2}}} = \frac{{{T_1}}}{{{T_2}}}$ ==> ${V_2} = \frac{{{V_1}{T_2}}}{{{T_1}}} = \frac{{300 \times 280}}{{300}} = 280\,ml.$
==> $\frac{{{V_1}}}{{{V_2}}} = \frac{{{T_1}}}{{{T_2}}}$ ==> ${V_2} = \frac{{{V_1}{T_2}}}{{{T_1}}} = \frac{{300 \times 280}}{{300}} = 280\,ml.$
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