Why is it possible for the temperature of a system to remain constant even though heat is released or absorbed by the system?

Isothermal Process

Explanation:

In this process heat is released or absorbed by the system happens at very slow rate in order to continually maintain the  temperature of the system through heat exchange. so ΔT = 0 ⇒ ΔU =0

First law of Thermodynamics ΔQ = ΔU + ΔW

⇒ ΔQ = ΔW

e.g Carnot Cycle

b.

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