Using values from Appendix C of your textbook, calculate the value of Keq at 298 K for each of the following reactions: (a) CH4(g) + 4 Cl2(g) CCl4(l) + 4 HCl(g) Keq = . (b) H2(g) + Br2(g) 2 HBr(g) Keq = . (c) Fe3O4(s) + 4 CO(g) 3 Fe(s) + 4 CO2(g) Keq = .