A graduated cylinder is placed on a balance and has a mass of 29.00g. 3.00cm3 of mercury are added to it and the mass reads 69.50g. What is the density of the mercury? a
9.67 g/cm3

b
23.2 g/cm3

c
13.5 g/cm3

d
12.2g/cm3

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

the correct answer would be b) volume versus temperature, because they are also directly proportional.