Question

zeroth law of thermodynamics

Answer 1

Zeroth law of thermodynamics
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If the two system A and B are separately in thermal equilibrium with the third system C , then the systems A and B are in thermal equilibrium with each other.

Answer 2

$\Large \text{Zeroth\: Law\: Of\: Thermodynamics }$

$\huge \text{STATEMENT }$

✍ If two bodies A and b are separately in thermal equilibrium with third body C, then the bodies A and B are said to be in thermal equilibrium.

$\huge \text{EXPLAINATION }$

✍ Refer The Above Diagram For Explaination:

✍ Let thermometer be third body C. It measures a particular temperature when it is in contact with A.

✍ If it measures the same temperature when it is in contact with B. Then according Zeroth law of thermodynamics A and B are at the same temperature. ie., A and b are in the thermal equilibrium.

$\large \text{Significance\ Of\: Zeroth\: Law\: Of\: Thermodynamics }$

✍ The temperature can be defined using zeroth law. Two bodies are said to be in thermal equilibrium. if their temperatures are same. Therefore, the temperature is the degree of hotness or coldness.