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Standard XII

Chemistry

Pressure and Temperature

Water has a c...

Question

Water has a critical specific volume $0.003155 m^{3} / k g$ . A closed and rigid steel tank of volume $0.025 m^{3}$ contains a mixture of water and steam at $0.1$ MPa. The mass of the mixture is $10$ kg. The tank is now slowly heated. The liquid level inside the tank

will remain constant

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will fall

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will rise

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may rise or fall depending on the amount of heat transferred

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Solution

The correct option is C will rise
Given data:
Critical specific volume of water:
$V_{C} = 0.003155 m^{3} / k g$

Volume of steel tank,
$V = 0.025 m^{3}$

Pressure of mixture of water and steam,
$p = 0.1 M P a = 1 bar$

Mass of mixture of water and steam,
$m = 10 k g$

Specific volume of mixture,
$V = \frac{V}{m} = \frac{0.025}{10} = 0.0025 m^{3} / k g$

As $V < V_{C},$ the condition of steam lies near to the saturated liquid line and the liquid level inside the tank will rise with heating.

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Water has a critical specific volume 0.003155m3/kg. A closed and rigid steel tank of volume 0.025m3 contains a mixture of water and steam at 0.1 MPa. The mass of the mixture is 10 kg. The tank is now slowly heated. The liquid level inside the tank

Water has a critical specific volume $0.003155 m^{3} / k g$ . A closed and rigid steel tank of volume $0.025 m^{3}$ contains a mixture of water and steam at $0.1$ MPa. The mass of the mixture is $10$ kg. The tank is now slowly heated. The liquid level inside the tank