Temperature Difference - It's essentially the same concept as temperature differential. Both terms mean the numerical difference between two temperatures taken at different locations or under different conditions at the same time. In most scientific and engineering usage, “temperature difference” and “temperature differential” are interchangeable. Temperature Differential - The difference in temperature between two separate points, objects, or systems at the same moment in time. It describes how much hotter or colder one location is compared to another and is often used in heat-transfer and engineering contexts. Temperature differential is spatial—it compares two different places or surfaces.
Change in Temperature - Is how much the temperature of a single object or system increases or decreases over time. It compares the temperature of the same object at two different moments, such as before and after heating. This is a temporal change and is commonly expressed as ΔT = T_final − T_initial.
