16.A motorist equips his automobile tires with a relief-type valve so that the pressure inside the tire never will exceed 240 kPa (gage). He starts a trip with a pressure of 200 kPa (gage) and a...

Extracted text: 16.A motorist equips his automobile tires with a relief-type valve so that the pressure inside the tire never will exceed 240 kPa (gage). He starts a trip with a pressure of 200 kPa (gage) and a temperature of 23°C in the tires. During the long drive, the temperature of the air in the tires reaches 83°C. Each tire contains 0.11 kg of air. Determine: a. The mass of air escaping each tire. b. The pressure of the tire when the temperature returns to 23°C.


Extracted text: 17. An automobile tire contains 3730 cu. in. of air at 32 psig and 80°F. a. What mass of air is in the tire? b. In operation, the air temperature increases to 145°F. If the tire is inflexible, what is the resulting percentage increase in gage pressure? c. What mass of the 145°F air must be bled off to reduce the pressure back to its original value?