NTA Abhyas JEE Main2020PhysicsThermodynamicsPractice
Two gases occupy two containers A and B ; the gas in A , of volume 0 . 10 m 3 , exerts a pressure of 1 . 40 MPa and that in B , of volume 0 . 15 m 3 , exerts a pressure 0 . 7 MPa . The two containers are joined by a tube of negligible volume and the gases are allowed to intermingle. Then if the temperature remains constant, the final pressure in the containers will be (in MPa )
Options
- A0 . 90
- B0 . 98
- C1 . 40
- D2 . 10
Correct answer
B. 0 . 98
Step-by-step solution
As the quantity of gas remains constant μ A + μ B = μ P A V A R T + P B V B R T = P V A + V B R T P = P A V A + P B V B V A + V B = 1.4 × 0.1 + 0.7 × 0.15 0.1 + 0.15 ⇒    P = 0.98 MPa