The chemical equation for the hydration of an alkali metal ion is M + (g): M +

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The chemical equation for the hydration of an alkali metal ion is M+(g): M+(aq). The standard Gibbs energy changes and the enthalpy changes for the process are denoted by ΔhydrG° and ΔhydrH° and respectively. ΔhydrG° and ΔhydrH° values are given below for the alkali metal ions.

M+ Lit Na+ K+ Rb+ AhydrH -522 -407 -324 -299 AhydrGo -481 -375 -304 -281 Cs+ -274 kJ mol- -258 kJ mol-

Use the data above to calculate ΔhydrS° values for the hydration process. Explain the trend in the ΔhydrS° values.

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General Chemistry Principles And Modern Applications

ISBN: 9780132931281

11th Edition

Authors: Ralph Petrucci, Jeffry Madura, F. Herring, Carey Bissonnette

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