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The zeroth law of thermodynamics describes the state where we can say what about the movement of heat between two substances?

Respuesta :

Edufirst

Answer:

  • The zeroth law of thermodynamics describes the state where there is not movement of heat between two substances.

Explanation:

The zeroth law of thermodynamics is a common sense statement, which is used to define the thermal equilirium.

The zeroth law states that if a system (a substance for example) has the same temperature as a second system, and the second system has the same temperature as a third system, then the first and the third systems also have the same temperature, and, hence, they are in thermal equilibrium.

Remember that heat flows in virtue of the temperature differences, from a higher temperature substance to a lower temperature substance, so if two or more substances have the same temperature they are in thermal equilibrium, which means that there is not movement of heat between the substances.

Explanation:

According to the zeroth law of thermodynamics, when two thermodynamic systems are in thermal equilibrium with a third system then it means all these systems will be in thermal equilibrium with each other.

For example, when system A is in thermal equilibrium with system B and system B is in thermal equilibrium with system C.

Then, both systems A and C will also be in thermal equilibrium with each other.

Hence, as the systems are in thermal equilibrium which means that there is no movement of heat.

Thus, we can conclude that the zeroth law of thermodynamics describes the state where we can say there is no movement of heat between two substances.

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