All changes which occur suddenly or which involve friction or dissipation of energy through conduction, convection or radiation are ----------
Correct answer: A. Irreversible changes
- A. Irreversible changes
- B. Chemical changes
- C. Cyclic changes
- D. Reversible changes
Explanation
Option A is correct since the transfer of heat by radiation, transfer of heat by conduction, and convection are irreversible reactions as they cannot be brought back to their initial state. All changes which occur suddenly or which involve the dissipation of energy through conduction, convection, or radiation are "Irreversible changes."
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About Thermal Equilibrium and Heat
Thermal equilibrium means that bodies in contact have the same temperature and no net heat flows between them. The topic distinguishes heat from temperature, uses the zeroth law of thermodynamics, and covers heat transfer, specific heat capacity, thermal expansion and the conditions for reaching equilibrium.
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