Which answer best describes what is happening in the following reaction? 2c8h18 + 25o2 mc022-1.jpg 16co2 + 18h2o this is not a redox reaction. it is an example of combustion. this is a redox reaction in which octane (c8h18) is oxidized. this is a redox reaction in which carbon dioxide (co2) burns due to ignition. this is not a redox reaction, because a solution of carbon dioxide and water results.

Answer is: This is a redox reaction in which octane (C8H18) is oxidized.

Balanced chemical reaction: 2C₈H₁₈ + 25O₂ → 16CO₂ + 18H₂O.

There same number of atoms on both side of balanced chemical reaction: eight carbon atoms, eighteen hydrogen atoms and twenty five oxygen atoms.

Carbon in octane lost electron, it is oxidized to oxidation number +4 in carbon dioxide (CO₂).

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