Question: An isothermal process is one in which the temperatures of the system and surroundings remain constant at all times. With this in mind, what is

An isothermal process is one in which the temperatures of the system and surroundings remain constant at all times. With this in mind, what is wrong with the following statement: “For an isothermal expansion of an ideal gas against a constant pressure, ΔT = 0, so q = 0”? What is q equal to in an isothermal expansion of an ideal gas against a constant external pressure?

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