Question

Calculate ΔG∘rxn and E∘cell at 25∘C for a redox reaction with n = 3 that has an equilibrium constant of K = 4.7×10−2. You may want to reference (Page) section 18.5 while completing this problem.

Part A

Express your answer using two significant figures.

Part B

Express your answer using two significant figures.

Answer 1

Part A. Calculation of sugan. we know that Van't Hoff reachon isotherm. Gibb's free which is gives a relation between energy and equilibrium constant K of a reaction. Keren = - RT in Keq. de. Here, eq. Constant K = 4.7810 T= 298 K and Gas constant Ra 8.314 JKT Therefore.. son - RT lnk 2-8.314 J K 'x 298 Kxdu(4.7x103) =-2477.57 g x ln (0.047) 7575.44 J = 7.6 kJ

Part Bi- calculation of Ecell The relation between Gibb's free energy og and electrical energy Ecel is Dan-nf Eal where F=96500 e moi Faraday constante Here given that n=3 Therefore Erell. As ren – 7575.44 5. - теохосоо са | 20.026 V Thus At 250€ Evels for given redox reaction. is 0.026 V
after considering the condition that answer must be in two significant figure