first law

Question

First law expresses conservation of:

RankGuru · Accepted Answer

The First Law of Thermodynamics is a statement of the **Law of Conservation of Energy** for thermodynamic systems.
- It states that the change in internal energy ($\Delta U$) of a system is equal to the heat added ($Q$) to the system minus the work done ($W$) by the system:
$\Delta U = Q - W$ (Standard Physics convention)
- Internal energy is a state function, meaning it depends only on the initial and final states, not the path taken.

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