The tyre pressure of a car was found to be 150cmHg in the...
The tyre pressure of a car was found to be 150cmHg in the morning at a temperature of 27°C. Hard driving in the afternoon raised the temperature of the tyres to 57°C. The tyre pressure by the afternoon would be?
increased by 15.0cm Hg
decreased by 15.0cm Hg
increased by 22.50cm
decreased by 22.50cm Hg
remained constant
Correct answer is A
P1T1 = P2T2 at constant volume
15027+273 = P157+273
P2 = 165cmHg
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