The images show two processes. A marshmallow on a stick, with one side turning brown. A glass with ice cubes and a small amount of water at the bottom. Image A: a roasting marshmallow Image B: melting ice Which statement about the two images is true? Image A shows a physical change, and image B shows a chemical reaction. Image A shows a chemical reaction, and image B shows a physical change. Both images show chemical reactions that are endothermic. Both images show chemical reactions that are exothermic.

hmmmm

Explanation:

first  picture.15 minutes in the question second picture 2 hours in the question

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