In thermodynamics, a process is called reversible when
A
surroundings and system change into each other
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B
there is no boundary between system and surroundings
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C
the surrounding are always in equilibrium with the system
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D
the system changes into the surroundings spontaneously
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Solution
The correct option is D the surrounding are always in equilibrium with the system A reversible process is a process that can be reversed by means of infinitesimal changes in some property of the system. Due to these infinitesimal changes, the system is in thermodynamic equilibrium with the surroundings throughout the entire process.