Question

1) At 20 Pa, the volume of a gas is 250 cm3. Calculate the volume if the pressure is increased to 45 Pa.
2) When tested in a warm garage at 28oC a motor tyre is found to have a pressure of 230 kPa. Assuming the volume of the air remains constant, what will be the pressure after the tyre has been kept in a cold room so that the temperature decreases to 16OC?
3)A cylinder contains 22 litre of gas at a pressure of 25000 Pa. The tap is opened until the pressure drops by 10 Pa and then closed. Find the volume of the gas after its pressure drops.

Answer 1

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(2) Typically, though, the daily temperature might fluctuate 10-15 degrees, perhaps 20 degrees maximum. If you fill your tyres when the outside temperature is 27 degrees, then take your vehicle out when it's 7 degrees at night, your tyre pressure will have dropped significantly – by 3.8 PSI.

(3) 20