A car tire is filled with air until a gage reads P = 240 kPa in an area where T = 0°C. The car is driven to Arizona where the temperature in the tire reaches 160°C. The gage pressure is approximately:

A) 540 kPa
B) 490 kPa
C) 440 kPa
D) 390 kPa


C) 440 kPa

The volume is assumed to be constant (it doesn’t blow up like a balloon!). The ideal gas law is

used: P1 V1= mRT1 and P2 V2 =mrt2 so P1 / P2 = T1 / T2 . Then, using absolute temperatures and

pressures (assume atmosphere pressure of 100 kPa since it is not specified),

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