Plants are responsible for a very important energy transformation, as shown. At left, a small grey circle is followed by an arrow pointing right to a large grey circle with a small white circle centered in it. The 4 arrows point to a vertical row of 4 images, 1 arrow per image. From top there are a medium sized grey circle with a small white circle centered in it, then a small grey circle, then another small grey circle, then another medium sized grey circle with a small white circle centered in it. Then comes + Energy. At the top of the vertical row of 4 images is the label Nucleus. At the bottom of the vertical row of 4 images is the label Nucleus.

Which energy transformation does the picture best illustrate?

radiant to chemical
nuclear to mechanical
chemical to thermal
mechanical to chemical

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