Question

4) If a y aus is compressed odibutically by doing work of 300 J , what is the change in internal energy of the gag. ​

Answer 1

Given: A gas compressed adiabatically by doing a work of 300J.

To Find: Internal energy of the gas.

Solution:

By the first law of thermodynamics,

 $\\ dU=Q-W$, where $\\ dU$=chnage in internal energy,

                                   $\\ Q$=Heat added to the system,

                                   $\\ W$=Work done by the system

Here, $\\ dW$= 300 J,

$\\ dQ$=0 J(Since the system is adiabatic as given and in In thermodynamics, it is a process where no transferring of heat or mass between the thermodynamic system and its environment is done.)

So,$\\ dU=dQ-dW=0-300$= -300J

Hence, Change in internal energy, dU=300J.