a gas occupied a volume of 250ml at 700mm Hg pressure and 25c.what additional pressure is required to reduce the gas volume to its 4/5th value at the same temperature?
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P1V1 =P2V2
P1 = 700 mm of Hg
V1 = 250 ml
P2 = ?
V2 = 4/5 of 250
= 4/5*250 =200
P2 = 700*250/200
= 875
ALSO P2 = ORIGINAL PRESSURE + ADDITIONAL PRESSURE
= 700 + 175 =875
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