Question

The litres of air measured at ${47}^o$ and pressure of 1 atm that should be let out to restore the tyre at 3 atm at ${47}^o$, is_________(as nearest integer)

Answer 1

To have pressure inside tyre 3.0atm at 320K,the decrease in pressure should be

3.31-3=0.31atm at 320K

This amount of pressure has volume 10litre .Thus volume of gas taken out at 1atm and 320k is obtained by

$P_1{V}_1=P_2{V}_2$; 0.31*10=1*V

V=3.1litre