Chapter 19, Problem 19.147QP

Consider the following cell reaction at 25°C.

$2{\text{Cr}}^{3+}(aq)+3\text{Zn}(s)\stackrel{}{\to }3{\text{Zn}}^{2-}(aq)+2\text{Cr}(s)$

Calculate the standard cell potential of this cell from the standard electrode potentials, and from this obtain ΔG° for the cell reaction. Use data in Appendix C to calculate ΔH°; note that Cr(H₂O)₆³⁺(aq) equals Cr³⁺(aq). Use these values of ΔH° and ΔG° to obtain ΔS° for the cell reaction.