Final answer:
The correct term for the temperature increase above the saturation point is 'Superheat temperature'. It describes the state of a gas when it is heated beyond its boiling point without a phase change.
Step-by-step explanation:
The amount of temperature increase above the saturation point is called Superheat temperature. When a substance is in a gaseous state at a temperature higher than its boiling point at a given pressure, it is known as being in a superheated state. For example, water at 1 atm pressure becomes a gas at 100°C, any temperature increase beyond this point without changing its gaseous state is referred to as superheat temperature. Understanding this concept is critical in fields such as refrigeration and air conditioning, where controlling the phase changes of substances is essential for system efficiency.