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Pressure is halved when ONLY volume is doubled (n and T are constant).

Remember the General Gas Law:

p.V = n.R.T

(in which R=general gas constant)

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12y ago
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8y ago

If you double the pressure of a sample of gas at a constant temperature, the volume is halved.

PV=nRT, where P=pressure, V=volume, n=number of moles, R=rate constant, and T=temp in Kelvin

If the temp stays the same then nRt is the same for both pressures and volumes.

Therefore P1 x V1 = P2 x V2.

For example, let's say the initial pressure (P1) is 1 ATM and the initial volume (V1) is 1 liter. Then the final pressure (P2) would be 2 ATM and the final volume (V2) would be 0.5 liters.

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8y ago

If you double the pressure you halve the volume, so the ration is 1/2
For the same amount (and temperature) double the pressure means half the volume.

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6y ago

the pressure is reduced by 1/2

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Q: What happens to pressure of constant mass of a gas at constant temperature when the volume is doubled?
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