One litre flask contains air, water vapour and a small amount of liquid water at a pressure of $200 m m H g$ . If this is connected to another one litre evacuated flask, what will be the final pressure of the gas mixture at equilibrium? Assume $T = 50^{0} C$ ,, aqueous tension at $50^{0} C$ is $93 m m H g$ . Give answer excluding the decimal places.

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answer is 146.

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Detailed Solution

The value of pressure

$\begin{array}{l} 1 \times (200 - 93) = P \times 2 \Rightarrow P = 53.5 \\ P_{Total} = 53.5 + 93 = 146.5 mm \end{array}$

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