Consider the following unbalanced oxidation-reduction reactions in aqueous solution:
Ag+(aq) + Li(s) → Ag(s) + Li+(aq)
Fe(s) + Na+(aq) → Fe2 + (aq) + Na(s)
K(s) + H2O(l) → KOH(aq) + H2(g)
(a) Balance each of the reactions.
(b) By using data in Appendix C, calculate ΔH° for each of the reactions.
(c) Based on the values you obtain for ΔH°, which of the reactions would you expect to be thermodynamically favored?
(d) Use the activity series to predict which of these reactions should occur. (Section) Are these results in accord with your conclusion in part (c) of this problem?
Chapter 6: An Introduction to Energy, Enzymes, and Metabolism Overview Overview o Chemical reaction: a process in which one or more substances are changed into other substances o Metabolism: the sum total of all chemical reactions that occur within an organism 6.1 Energy and Chemical Reactions Overview o Two factors govern chemical reactions Direction Rate o aA + bB cC + dD Direction: whether C + D are formed (forward) or A + B are formed (reverse) A, b, c, d = moles of reactants and products Energy Exists in Different Forms o Energy: the ability to promote change or do work