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11 Nov 2019
Q6. (a) The rate constant, K, for any reaction is related to the activation energy, Ea, by the Arrhenius equation i) Explain the meaning of the terms: rate constant and activation energy ii) A particular reaction is found to be second order overall. Specify the units for both the rate of the reaction and the rate constant. CHEM-01B Experiment E: Activation Energy (b) The rate constant, K was determined for the decomposition of hydrogen iodide at various temperatures. The results given in In K for the range of temperatures are given below Temperature T/K 550 600 650 700 750 Ink - 15.6 - 12.2 9.4 Temperature (1/T) K 1.82 x 10 1.67 x 10 1.54 x 10 1.43 x 10 1.33 x 10 4.9 h of In K against (1/T). (Take the In K axis from -20 to 0 and the 1/T axis from 1.2 x 103 to 1.9 x 103 K). ii) Calculate the gradient (slope) of the graph and its units and use it to determine a value for the activation energy, Ea, stating its units.
Q6. (a) The rate constant, K, for any reaction is related to the activation energy, Ea, by the Arrhenius equation i) Explain the meaning of the terms: rate constant and activation energy ii) A particular reaction is found to be second order overall. Specify the units for both the rate of the reaction and the rate constant. CHEM-01B Experiment E: Activation Energy (b) The rate constant, K was determined for the decomposition of hydrogen iodide at various temperatures. The results given in In K for the range of temperatures are given below Temperature T/K 550 600 650 700 750 Ink - 15.6 - 12.2 9.4 Temperature (1/T) K 1.82 x 10 1.67 x 10 1.54 x 10 1.43 x 10 1.33 x 10 4.9 h of In K against (1/T). (Take the In K axis from -20 to 0 and the 1/T axis from 1.2 x 103 to 1.9 x 103 K). ii) Calculate the gradient (slope) of the graph and its units and use it to determine a value for the activation energy, Ea, stating its units.
Lelia LubowitzLv2
12 Jun 2019