Calculate the standard reaction entropy,G and H at 298 K of the following reactions. (a) 2 CH3CHO(g) O2(g) → 2 CH3COOH(l) (b) 2 AgCl(s) Br2(l) → 2 AgBr(s) Cl2(g) (c) Hg(l) Cl2(g) → HgCl2(s)