1230kj of energy are transferred of a box of gas into the lower temperature room that it is placed in. The gas has 840kj of work done to it. How much internal energy did the gas gain or lose?
To determine the change in internal energy, we need to consider the energy transferred into the gas and the work done to the gas.
The energy transferred into the gas is 1230 kJ, and the work done to the gas is 840 kJ.
Since work is considered as a transfer of energy into or out of a system, we can add the magnitude of work done to the energy transferred to the gas:
1230 kJ + 840 kJ = 2070 kJ
Therefore, the gas gained 2070 kJ of internal energy.
To determine the change in internal energy of the gas, we need to consider the energy transferred and the work done on the gas.
Given:
Energy transferred = 1230 kJ
Work done on the gas = 840 kJ
The change in internal energy (ΔU) can be calculated using the First Law of Thermodynamics:
ΔU = Energy transferred - Work done
ΔU = 1230 kJ - 840 kJ
ΔU = 390 kJ
The gas gained 390 kJ of internal energy.