One mole of an ideal gas at 300 K is expanded isothermally from an initial volume of 1 litre to 10 litres. The ΔE for this process is (R = 2 cal. mol⁻¹ K⁻¹)

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zero. In an isothermal process for an ideal gas, the internal energy change (ΔE) is zero because internal energy depends only on temperature, which remains constant.

One mole of an ideal gas at 300 K is expanded isothermally from an initial volume of 1 litre to 10 litres. The ΔE for this process is (R = 2 cal. mol⁻¹ K⁻¹)

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