Achemical reaction release 55.2 kcal. how many kilojoules does this correspond to?

231.0 kJ

Explanation:

Chemical reactions releasing heat energy are exothermic reactions.

The chemical reaction released 55.2 kcal

1 kcal is equivalent to 4.184 kJ

Therefore 55.2 kcal is equivalent to - 4.184 kJ/kcal x 55.2 kcal

the energy in kJ is - 231.0 kJ

gold is my favorite solid.

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