Agas is compressed from an initial volume of 5.65 l to a final volume of 1.24 l by an external pressure of 1.00 atm. during the compression the gas releases 122 j of heat.

This is an incomplete question. The complete question is:

A gas is compressed from an initial volume of 5.50 L to a final volume of 1.20 L by an external pressure of 1.00 atm. During the compression the gas releases 128 J of heat. What is the change in internal energy of the gas?

325 Joules

Explanation:

According to first law of thermodynamics:

=Change in internal energy

q = heat absorbed or released

w = work done or by the system

w = work done on the system=  {Work is done on the system as the final volume is lesser than initial volume and is positive}

w =  {1Latm=101.3J}

q = -122J   {Heat released by the system is negative}

Thus the change in internal energy of the gas is 325 Joules

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