Work done during state change refers to the amount of energy required to change the state of a substance from one phase to another, such as from solid to liquid or liquid to gas.
The amount of work done during state change can be calculated by multiplying the change in internal energy (ΔU) by the number of moles of the substance (n).
The amount of work done during state change is affected by the nature of the substance, the temperature and pressure at which the state change occurs, and the amount of substance undergoing the state change.
Work done during state change is important because it allows us to understand the energy required for a substance to change from one phase to another, which has practical applications in industries such as food production, manufacturing, and energy production.
Work done during state change is governed by the first law of thermodynamics, which states that energy cannot be created or destroyed, only converted from one form to another. This means that the energy required for a state change must come from an external source, such as heat or pressure.