Answer :
Final answer:
An isothermal process involves a system with a constant temperature and heat exchange. It contrasts with adiabatic processes that involve no heat exchange.
Explanation:
An isothermal process is a change of a system where the temperature remains constant: ΔT = 0. This occurs when the system is in contact with an outside thermal reservoir, allowing for continual temperature adjustment through heat exchange. In contrast, an adiabatic process has no heat exchange. In an isothermal process, ΔT = 0 but heat (Q) ≠ 0.
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