First slide

Thermodynamic processes

Question

During an isothermal expansion of an ideal gas

Moderate

A

Its internal energy decreases
B

Its internal energy does not change
C

The work done by the gas is equal to the quantity of heat absorbed by it
D

Both (b) and (c) are correct

Solution

During isothermal change T = constant $\Rightarrow ΔU = 0$ also from FLOT, $ΔQ = ΔW$ .

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