👉 An isentropic curve, also known as an isentropic diagram or isentropic plot, is a graphical representation of the relationship between temperature and pressure in an ideal gas. It shows how the volume of a gas changes with its temperature while pressure remains constant. In simple terms, for an ideal gas, at a given temperature, increasing the pressure increases the volume but does not affect the temperature. This property is known as the isentropic expansion law. The graph represents this relationship by showing