Three bulbs are filled with CH 4 , CO 2 and Ne as shown in the picture. The bulbs are connected through pipes of zero volume. When the stopcocks are opened and the temperature is kept constant throughout, the pressure of the system is found to be______ atm. (Nearest integer).

Step-by-step solution

The total number of moles remains constant. n 1 + n 2 + n 3 = n f n 1 , n 2 ,   n 3 moles of gases in the individual containers. n f is resultant moles. Using ideal gas equation PV = nRT , we van write as P 1 V 1 RT + P 2 V 2 RT + P 3 V 3 RT = P f V f RT P 1 V 1 + P 2 V 2 + P 3 V 3 = P f V f 2 × 2 + 4 × 3 + 3 × 4 = P f × 9 P f = 28 9 ≈ 3