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If gas is expanded freely from 1 litre to 5 litres at a temperature of 60-degree centigrade what is the work done?(a) Positive(b) Negative(c) 0(d) InfinityI got this question by my school principal while I was bunking the class.The question is from Thermodynamics Applications topic in division Thermodynamics of Chemistry – Class 11

Answer»

Right answer is (c) 0

The best I can explain: When gas is expanded freely in a vacuum there is ZERO pressure exerted. The formula for WORK done is given by pressure X change in volume = 0 x 4. So the work done is zero in the process of FREE expansion.



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