The equation ΔU = ΔQ refers to:
Correct answer: C. Isochoric process
- A. Isothermal process
- B. Adiabatic process
- C. Isochoric process
- D. Isobaric process
- E. Carnot cycle
Explanation
For equation ΔU = ΔQ + W to be ΔU = ΔQ, the work done should be equal to 0. Work done is equal to P*ΔV, so for work done to be zero, change in volume should be zero (there should be constant volume). Processes with constant volume are called isochoric processes.
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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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