4 A rubber balloon filled with argon gas decreases in volume as its temperature decreases.
Which best explains this behavior?
OA
The argon atoms absorb heat as they react with the rubber molecules in the balloon.
ОВ.
The argon atoms form shorter bonds with the balloon molecules when the temperature is
cold.
О С.
The argon atoms slow down and collide against the balloon's surface with less force and
frequency
OD
The argon atoms diffuse through the balloon because their atomic radii decreases in cold
temperatures.

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