Which process involves no heat exchange with the surroundings?
Correct answer: D. Adiabatic
- A. Isothermal
- B. Isobaric
- C. Isochoric
- D. Adiabatic
Explanation
Adiabatic means thermally isolated, so the system exchanges energy only as work. Isothermal means constant temperature, isobaric constant pressure and isochoric constant volume, and each of these generally does involve heat flow. A very rapid change approximates an adiabatic one because heat has no time to move.
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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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