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Home  >>  JEEMAIN and AIPMT  >>  Physics  >>  Class11  >>  Kinetic Theory of Gases
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A vessel is filled with an ideal gas at 76 cm of Hg (mercury). The mass of gas is increased by 25% by introducing more gas at the same temperature. What is the resultant pressure of Hg in cm?

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At constant Pressure, Temperature and Volume, $P\; \alpha\; n\; \rightarrow \large\frac{P_1}{P_2} $$=\large\frac{n_1}{n_2}$
$\Rightarrow P_2 = \large\frac{P_1\;n_2}{n_1} $$ = \large\frac{1.25P_1}{1} $$= 1.25 P_1 =$95cm of Hg.
answered Jan 28, 2014 by balaji.thirumalai
 

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