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

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Engineering Thermodynamics
According to First law of thermodynamics,

Total energy of a system remains constant
Internal energy, enthalpy and entropy during a process remain constant
Total internal energy of a system during a process remains constant
Work-done by a system is equal to the heat transferred by the system

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