Question

1250kj of energy are transfered out of of a box of gas in to the lower temperature room that it placed in. The gas has 840kj work done to it. How much internal energy did gas gain or lose?

Answer 1

To find the change in internal energy of the gas, we need to consider the energy transferred and the work done on the gas.

The energy transferred out of the gas is 1250 kJ (transfer out of the box).

The work done to the gas is 840 kJ (work done on the gas).

Since energy is conserved, the change in internal energy is equal to the sum of the energy transferred out and the work done on the gas:

Change in internal energy = Energy transferred out + Work done on the gas
Change in internal energy = 1250 kJ + 840 kJ
Change in internal energy = 2090 kJ

Therefore, the gas gained 2090 kJ of internal energy.