Fe(s) reacts with O2(g) to produce iron(III) oxide. Consider the reaction of 0.626 mol Fe with 19.20 g O2 to produce iron(III) oxide.
(i) What is the name of this reaction?
(ii) When the reaction is complete (finished), what mass of Fe remains unreacted?
(iii) When the reaction is complete (finished), how many molecules of O2 remain unreacted?

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

its b it was a compound