Question

Two container each containing liquid water are connected as shown in diagram. Given that vapour pressure of $H_{2}O\left(l\right)$ at $300K$ and $350K$ are $22torr$ and $40torr$. Select right statement(s).

• A. The final pressure in each container if valve is opened while keeping the containers at the given temperature is $22torr$
• B. The final pressure in each container if valve is opened while keeping the containers at the given temperature is $40torr$
• C. Mass of $H_{2}O\left(l\right)$ is decreased in vessel $X$
• D. Mass of $H_{2}O\left(l\right)$ is decreased in vessel $Y$

Answer 1

Answer: (A), (D)

The final pressure in each container if valve is opened while keeping the containers at the given temperature is $22torr$
Mass of $H_{2}O\left(l\right)$ is decreased in vessel $Y$

The vapour pressure in the container $Y$ is higher than the vapour pressure in the container $X$.
When the valve is opened, the vapors from container $Y$ diffuse into the container $X$ and condense there.
When the equilibrium is re-established, the mass of liquid water in the container $Y$ decreases and the mass of the liquid water in the container $X$ increases.
The final pressure in the two containers will be same, $i.e.,22torr$.