70j of energy are given off by a volume of gas to an outside system. Than, the gas expands and does 45j, of work outside the system. What is the net internal change of the internal energy of this volume of gas.

Answer 1

To find the net internal change of the internal energy of the gas, we need to subtract the work done by the gas on the external system from the energy given off by the gas to the outside system.

Net Internal Change = Energy given off - Work done outside
= 70j - 45j
= 25j

Therefore, the net internal change of the internal energy of the gas is 25j.