An object with less massive molecules will have higher molecular speed at the same temperature.Increasing temperature will increase molecular speed.This scenario is called the "zeroth law of thermodynamics" since this understanding logically precedes the ideas contained in the important First and Second Laws of Thermodynamics. We could say that A is at the same temperature as C even though they are not in contact with each other. We would then say that they are at the same temperature, and we would say that temperature is a property of these objects which implies that they will no longer transfer net energy to one another. By equilibrium we mean that they are no longer transferring any net energy to each other. ![]() One approach to the definition of temperature is to consider three objects, say blocks of copper, iron and alumninum which are in contact such that they come to thermal equilibrium.
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