calculate δssurr for the following reaction at 25 °c: s(s, rhombic) o2(g) ⇄ so2(g) δh°f (kj/mol) s° (j/mol⋅k) s(s, rhombic) 0 32.1 o2(g) 0 205.2 so2(g) -296.8 248.2