Question

Difference b w reversible and irreversible process

Answer 1

In a reversible process, at each point along the process path, the system is only slightly removed from being in thermodynamic equilibrium with its surroundings.For a reversible process, the system is ALWAYS in equilibrium with its surroundings. For an irreversible process, there will ALWAYS be an entropy change.

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Answer 2

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Chemistry

Reversible: rechargeable battery
Irreversible: regular one-use battery 

Physics

Reversible: ideal (mathematical) elastic collision, harmonic oscillator, magnetic hysteresis, heat expansion of gases or solids, all other frictionless motion 

Irreversible: actual (physical) partially inelastic collision, harmonic oscillator with damping, magnetic hysteresis, heat expansion, all other motion with friction or "heat loss" due to the second law of thermodynamics 

Biology

Reversible: ideal ADP-ATP conversion without entropy loss

Irreversible: all biological processes

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