1.

A gas expands against a variable pressure given by P=(20)/(V)(where P in atm and V in L). During expansion from volume of 1 litre to 10 litre, the gas undergoes a change in internal energy of 400 J. How much heat in J is absorbed by the gas during expansion ?

Answer»


Solution :`dW=-Pdv=(20)/(v)xx DV = 20 int_(1)^(10)(dv)/(v)=20 ln 10 = 10 =-46.06` LATM `= -4665.878 J, "" Delta U = 400 J`
Using first LAW of thermodynamics Q = 5065.878 J.


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