Question

A gas occupies 300 ml at 27 degree celsius and 730 mm pressure what would be its volume at stp

Answer 1

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Answer 2

Answer: The volume of gas at STP is 262.2 ml.

Explanation: The combined gas equation is,

$\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}$

where,

$P_1$ = initial pressure of gas = 730 mm Hg

$P_2$ = pressure of gas at STP = 760 mm Hg

$V_1$ = initial volume of gas = 300 ml

$V_2$ = volume of gas at STP = ?

$T_1$ = initial temperature of gas = $27^oC=273+27=300K$

$T_2$ = temperature of gas at STP= $0^oC=273+0=273K$

Now put all the given values in the above equation, we get the final pressure of gas.

$\frac{730mmHg\times 300ml}{300K}=\frac{760mmHg\times V_2ml}{273K}$

$V_2=262.2ml$

Therefore, volume of gas at STP is 262.2 ml.