In a laboratory demonstration, two clear liquids were mixed while students made observations. Students observed that the temperature changed from 26C to 22C when the solutions were mixed, and that a white solid formed and sank to the bottom of the test tube. What most likely happened to produce these results? The water rapidly evaporated, leaving a solid.
Some of the water molecules froze and sank to the bottom of the test tube.
The solutions reacted chemically, producing a solid that sank to the bottom of the test tube.
One of the original compounds was not soluble at the colder temperature, and came out of solution. its science help me pls

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