A reversible isothermal process is a thermodynamic process where the temperature remains constant throughout and the process is carried out infinitely slowly.
• Isothermal: means that the temperature remains constant.
• Reversible: It occurs when the system is in equilibrium at all times, requiring an infinitesimally slow change and therefore infinitesimally slow process.
Pressure may change during an isothermal reversible process. Therefore, correct conditions are Infinitesimally slow process and constant temperature.
Give Reasons:
(I) \( \text{Ce}^{4+} \) in aqueous solution is a good oxidising agent.
(II) The actinoid contraction is greater from element to element than lanthanoid contraction.
(III) \( E^\circ_{\text{M}^{2+}/\text{M}} \) value is more negative than expected, whereas \( E^\circ_{\text{Cu}^{2+}/\text{Cu}} \) is positive.