When is delta U = 0?

[JeremyPark14B]

Under what conditions is delta U = 0?

[Salena Chowdri 1I]

For an isothermal system delta U = 0

[kateminden]

The first law of thermodynamics states that the internal energy (delta U) of an isolated system is constant. This means that delta U = 0 in an isolated system, because no energy can be transferred to/from the system and no work can be done on or is being done by the system.

[Claudia Luong 4K]

In isothermal systems, the internal energy does not change so delta U is always equal to zero.

[lukezhang2C]

Looking at the equation Delta U = q + w, delta U is only 0 when q = -w which means heat put into the system is equal to the heat out of the system, in other words the system is isolated with no net change in internal energy.