Thermodynamics 101

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A process in which the system is completely isolated from its surroundings
A process that changes variables rapidly
A process in which the system changes variables slowly and remains in equilibrium with its surroundings (correct)
A process in which the system is not in equilibrium at every stage

<p>A process in which the system is completely isolated from its surroundings (A)</p> Signup and view all the answers

<p>They are not easily described or predicted (D)</p> Signup and view all the answers

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A gas in thermal and mechanical equilibrium has the same pressure and temperature as its surroundings.
Sudden reduction of external pressure leads to non-equilibrium states that don't have well-defined pressure and temperature.
Quasi-static process is an idealized process in which the system is in equilibrium at every stage.
In a quasi-static process, the system changes its variables (P, T, V) so slowly that it remains in thermal and mechanical equilibrium with its surroundings throughout.
A process in which the temperature of the system is kept fixed throughout is called an isothermal process.
In isobaric processes, the pressure is constant.
In isochoric processes, the volume is constant.
Adiabatic process is insulated from the surroundings and no heat flows between the system and the surroundings.
Non-equilibrium states of a system are difficult to deal with.
Quasi-static processes are a reasonable approximation to an ideal quasi-static process.