Using data from the appendix, calculate ΔS o rxn and ΔSsurr for each of the reactions and determine if each is spontaneous at 25°C. (a) 2 KClO4(s) → 2 KClO3(s) + O2(g) ΔS o rxn = J/K ΔS o surr = J/K Is the reaction spontaneous at 25°C? yes no (b) 2 Na(s) + 2 H2O(l) → 2 NaOH(aq) + H2(g) ΔS o rxn = J/K ΔS o surr = × 10 J/K (enter your answer in scientific notation) Is the reaction spontaneous at 25°C? yes no (c) N2(g) → 2 N(g) ΔS o rxn = J/K ΔS o surr = × 10 J/K (enter your answer in scientific notation) Is the reaction spontaneous at 25°C? yes no

the only liquid elements at standard temperature and pressure are bromine (br) and mercury (hg). although, elements caesium (cs), rubidium (rb), francium (fr) and gallium (ga) become liquid at or just above room temperature.

explanation:

answer; talc and gypsum;

answer : (a) volume of the gas = 8.67 ×   l

                (b) second virial coefficient b = -1.21226 l/mole

solution :   given,     t = 300k

                                p = 20atm

                                z = 0.86

                                n = 8.2 mmoles = 8.2 × moles

                                r =   0.082 l atm/k/mol

        find,     (a) volume of gas   and (b) second virial coefficient b at 300k.

formula used :            

                          and            

(a)            

                    = \times 0.082\times 300}{20}[/tex]

                    = 8.67 ×   l

(b)      

                    = (0.00867-1) × 8.659

                    = - 8.5839 l/mole