Question

Volume of certain amount of gas at 25 degree celsius and 100 cm hg pressure is 80 ml. The gas is expanded to 160ml keeping the temperature constant.Calculate the pressure of the expanded gas

Answer 1

The pressure of the expanded gas is 50 cm Hg

Explanation:

To calculate the new pressure, we use the equation given by Boyle's law. This law states that pressure is inversely proportional to the volume of the gas at constant temperature.  

The equation given by this law is:

$P_1V_1=P_2V_2$

where,

$P_1$ = initial pressure of gas= 100 cm Hg

$V_1$ =  initial volume of gas = 80 ml

$P_2$ = final pressure of gas= ?

$V_2$ = final volume of gas = 160 ml

Putting values in above equation, we get:

$100cm Hg\times 80mL=P_2\times 160ml$

$P_2=50cm Hg$

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Answer 2

See your answer is in picture