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A state function is a property that does not depend on the path taken. An example of a state function is temperature. For example, a pot of boiling water at 212 F could be boiled for hours or minutes, in a microwave or an oven, etc., it would still be at 212 F. The path taken does not matter. You most likely already know that temperatures can be added, multiplied, etc.
In lecture, Lavelle highlighted that a state property (such as enthalpy) is not dependent on the path taken to obtain that state. Some state property examples include E, P, V, T, density, and heat capacity. On the other hand some that are not state peroperties include work (w) and heat (q).
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