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05/10/2020 11:43 am
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Critical temperatures for A, B, C and D gases are 25°C, 10°C, –80°C and 15°C respectively. Which gas will be liquefied more easily?
(a) A
(b) B
(c) C
(d) D
1 Answer
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05/10/2020 11:45 am
(a) A
Explanation:
Critical temperature of a gas is given by
TC = 8a/27Rb => a ∝TC
where a is measure of vander Waal's forces of attraction. Higher the critical temperature of a gas greater the intermolecular forces of attraction between the molecules of gas and easily the gas can be liquefied. Hence gas A whose critical temperature (25°C) is highest among all the given options will be liquified more easily.