Question

Name a change that can be both reversible and irreversible in some special conditions

Answer 1

When the system undergoes a change from its initial state to the final state, the system is said to have undergone a process. During the thermodynamic process, one or more of the properties of the system like temperature, pressure, volume, enthalpy or heat, entropy, etc. changes. The second law of thermodynamics enables us to classify all the processes under two main categories: reversible or ideal processes and irreversible or natural processes.



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Answer 2

burning of a candle:
when the wax of a candle melt it is reversible as the wax can be solidified easily.
the thread of the candle burn and produce co2 which is irreversible in nature.