A vessel has gas saturated with water vapours at a total pressure of 1 atm. The vapour pressure of water is 0.3 atm. The contents of this vessel are completely transferred to another vessel having one

Question

A vessel has $N_2$ gas saturated with water vapours at a total pressure of 1 atm. The vapour pressure of water is 0.3 atm. The contents of this vessel are completely transferred to another vessel having one-third of the capacity of original volume, at the same temperature. The total pressure of this system in the new vessel is

Prashant Kotian · Accepted Answer

Correct answer: D. Initial P() = 1.0 - 0.3 = 0.7 atm . At 1/3 volume, final P() = 3 * 0.7 = 2.1 atm . Assuming water vapour remains saturated, V.P. of water remains 0.3 atm . Total pressure = 2.1 + 0.3 = 2.4 atm .

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