Question

Calculate the final pressure of a sample of CO2 that expands reversibly and adiabatically from 57.4 kPa and 1.0 dm3 to a final volume of 2.0 dm3 . Take  = 1.4.

Answer 1

$P_1V_1=P_2V_2$

$P_2=P_1(\frac{V_1}{V_2})^{1.4}$

$P_2=57.4(\frac{1.0}{2.0})^{1.4}=22kPa$

Final pressure $P_2=22kPa$