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Application of perfect gas equation to air filled in a tyre

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A tyre is filled with air at 14.9 degree C to a gauge pressure of 231 kPa. If the tyre reaches a temperature of 37.5 degree C, what fraction of the original air must be removed if the original pressure of 231 kPa is to be maintained?

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Problem is solved with application of perfect gas equation.

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In the present problem following data is given :

Initial temperature T1 = 14.9OC = 14.9 + 273 = 287.9 K

Final temperature T2 = 37.5OC = 37.5 + 273 = 310.5 K

Initial pressure P1 = 231 kPa = 231 x 103 Pa

Final pressure P2 = Initial pressure P1 ...

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