Engineering Thermodynamics
The door of a running refrigerator inside a room was left open. Which of the following statements is correct?

The room will be gradually warmed up
The room will be cooled very slightly
The temperature of the air in room will remain unaffected
The room will be cooled to the temperature inside the refrigerator

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Engineering Thermodynamics
Zeroth law of thermodynamics

States that if two systems are both in equilibrium with a third system, they are in thermal equilibrium with each other
Deals with heat engines
Deals with conversion of mass and energy
Deals with reversibility and irreversibility of process

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