Answer to Question #150795 in Molecular Physics | Thermodynamics for Kavindu

Question

In an automobile engine, the gas (a mixture of air and petrol) in the cylinders is compressed to 1\9 of its original volume. The initial pressure is 1.0 atm and the initial temperature is 27 °C.

If the pressure after compression is 21 atm, the temperature of the compressed gas is (Assume that the gas behaves as ideal.)

Answer 1

Answer

Using equation

PV=nRT

V is constant here.

So final temperature

$T_f=\frac{P_fT_i}{P_i}=\frac{273}{9}=30.33K$