Which of the following is true for an exothermic reaction?

a. the enthalpy of the products is greater than that of the reactants.

b. the enthalpies of the reactants and the products are equal.

c. the enthalpy of the reactants is greater than that of the products.

colorless gas, exhibiting a blue glow when placed in an electric field

b) solid

its a type of rock

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