The dimerization ofC2F4follows second-order kinetics and hasa rate constant of 0

Question

The dimerization ofC2F4follows second-order kinetics and hasa rate constant of 0.0488 M1min1at 425.0 ºC.
2C2F4 C4F8 If we start with0.120 mol of C2F4 in a 2.00 L flask,(a)what will be the concentration of C2F4 after 1.00 hr?(b)How many grams of C4F8 will be producedin 1.00 hr? The dimerization ofC2F4follows second-order kinetics and hasa rate constant of 0.0488 M1min1at 425.0 ºC.
2C2F4 C4F8 If we start with0.120 mol of C2F4 in a 2.00 L flask,(a)what will be the concentration of C2F4 after 1.00 hr?(b)How many grams of C4F8 will be producedin 1.00 hr?

Explanation / Answer

Formula:                     1 / [A] = kt + 1 / [A]0 Where k is the second order rate constant            tis the time           [A] is the concentration of A at time t           [A]0 is the intial concentration Data :               k = 0.0488 M1min1              t    = 1 h                   = 1 * 60 min                   = 60 min           [A]0 = 0.120 mol / 2.00 L                   = 0.06 M       1 / [A] =  0.0488 M1min1 *60 min + 1 / 0.06 M                    = 2.928 / M   + 16.67 / M                    =19.598 / M            [A] = 0.051 M b) No.of mols of C2F4 after 1h = 0.051 M * 2 L                                                   = 0.102 mols No.of mols of C2F4 consumed   = 0.120 mols -0.102 mols                                                   =  0.018 mols These mols will be equal to the no.of mols of C4F8 formed . Mass of C4F8 = 200.028 g / mol * 0.018 g                       = 3.6 g                                 

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