A tire is filled with air at 15ºC to a gaugepressure of 220 kPa. The tire reache
ID: 1667050 • Letter: A
Question
A tire is filled with air at 15ºC to a gaugepressure of 220 kPa. The tire reaches a temperature of 38ºC.(a) What will be the gauge pressure in the tire at 38ºC?(b) What fraction of the air must be removed at 38ºC torestore the original pressure of 220 kPa? A tire is filled with air at 15ºC to a gaugepressure of 220 kPa. The tire reaches a temperature of 38ºC.(a) What will be the gauge pressure in the tire at 38ºC?
(b) What fraction of the air must be removed at 38ºC torestore the original pressure of 220 kPa?
Explanation / Answer
A tire is filled with air at 15ºC to a gauge pressure of220 kPa. The tire reaches a temperature of 38ºC. (a) What willbe the gauge pressure in the tire at 38ºC?P1/T1=P2/T2
P2=220*311/288=237.5kpa
(b) What fraction of the air must be removed at 38ºC torestore the original pressure of 220 kPa?
P1/n1=P2/n2
fraction=220/237.5=0.92
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