Isobaric processes occur at:
Correct answer: B. Constant pressure
- A. Constant temperature
- B. Constant pressure
- C. Constant volume
- D. Constant temperature and constant pressure
Explanation
Isobaric process is a process in which the change in pressure is 0 i.e. pressure remains constant.Processes at constant volume are called 'isochoric'.Processes at constant temperature are called 'isothermal'.The word "iso" means same/constant and bar means pressure since we know that unit of pressure is bar.
This question appeared on the UHS MDCAT 2017 paper, which you can sit online with every answer explained.
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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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