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Question
A certain mass of gas occupied 850 ml at a pressure of 760 mm of Hg. On increasing the pressure it was found that the volume of the gas was 75% of its initial value. Assuming constant temperature, find the final pressure of the gas?
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Solution
V1 = 850 ml
V2 = `850 xx 75/100 = (850 xx 3)/4` ml
P1 = 760 mm of Hg
P2 = ?
At constant temperature P1V1 = P2V2
∴ P2 = `("P"_1"V"_1)/"V"_2`
`= (760 xx 850 xx 4)/(850 xx 3)`
P2 = `3040/3 = 1013.33` mm of Hg
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