Question

write first law of thermodynamic system and explain isochoric , isothermal and adiabatic processes on its basis

Answer 1

HEY
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HERE IS YOUR ANSWER
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An isochoric process is one where the volume stays constant, and the temperature and pressure change relative to each other.
An adiabatic process is one where no heat flows in or out of the system: pressure, volume and temperature all change relative to each other.

Answer 2

1. isochoric : a process which takes place at constant pressure
2. isothermal: a process is said to be isothermal if the temp. of the process remains at constant during the process
3. adiabatic: a process is said to be adiabatic if the temp. of the system does not remain constant during the process.

The first law of thermodynamics states that the change in internal energy ∆U of a closed system is equal to the amount of heat supplied to the system minus the amount of work done by the system on its surroundings.