Question

a certain volume of an ideal gas in a vessel is 2 litres at normal pressure (1×10^5Nm^-2). the pressure of the gas is increased under isothermal condition until its volume remains 1 litre .Find the increased pressure of the gas​

Answer 1

Answer:

Change in volume △V

2

−V

1

=4−10=−6m

3

A volume decreases, work is done on the gas and so it is negative.

W=p△V=50×(−6)=−300J

Additional heat supplied (G=+100J). So, for the first law of thermodynamics change in external energy is given by

△U=Q−W=100−(−300)=400J

Internal energy increases by 400 J.