Question

Two samples A and B of a gas initially at the same pressure and temperature are compressed from volume V to V/2 (A isothermally and B adiabatically). The final pressure of A is –

• A. Greater than the final pressure of B
• B. Equal to the final pressure of B
• C. Less than the final pressure of B
• D. Twice the final pressure of B

Answer 1

Answer: (C)

Less than the final pressure of B

Answer 2

A® Isothermal PV = const.

B ® Adiabatic PV^g = const.

\P_B > P_A or P_A < P_B hence (3)