Refrigerator is an example of:
Correct answer: B. Second law of thermodynamics
- A. First law of thermodynamics
- B. Second law of thermodynamics
- C. Newton law of motion
- D. Entropy
Explanation
According to the Second Law of Thermodynamics, heat will always flow spontaneously from hot to cold, and never the other way around. A refrigerator causes heat to flow from cold to hot by inputting work, which cools the space inside the refrigerator.
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About First Law of Thermodynamics
The first law relates heat supplied, work done and the change in internal energy through energy conservation. Problems use sign conventions and apply the law to isothermal, adiabatic, isobaric and isochoric processes. Internal energy is a state function, while heat and work depend on the path followed.
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More First Law of Thermodynamics questions
Which of the following statements is correct for any thermodynamic system?
Which one is true for internal energy?
For an isothermal process heat added to an ideal system versus work performed by that system is represented graphically:
Thirty joules of heat flow into a system. The system in turn does 50 Joules of work. The internal energy of the system has:
The amount of heat provided to a system at constant pressure (qp) is equal to _.
The internal energy of a system during an isothermal process: