Question

Air is pumped into an automobile tube upto a pressure of 200 kPa in the morning when the air temperature is 22°C. During the day time, temperature rises to 42°C and the tube expands by 2% the pressure of the air in the tube now is

(1) 212 kPa

(2) 209 kPa

(3) 206 kPa

(3) 200 kPa

Answer 1

(2) 209 kPa

According to ideal gas equation PV = nRT

Given

Substituting given values in Eqn (1) we have