Saturday, February 9, 2019
Reaction Kinetics Essay -- essays research papers
answer Kinetics Rate of ReactionOf Tertiary-Butyl BromidePurpose The purpose of this prove is to find the order of t-BB graphically, to find the k ( esteem constant) at 0&730 C and at room temperature, also to find the Ea (activation energy).Principles Several different chemical substance kinetic principles were used in this experiment. The reaction rates of this chemical comparability were indomitable experimentally. This then allowed the reaction mechanisms (i.e. orders of each component, rate constant, etc.). These mechanisms were ultimately determined to be compiled to form a rate law. Rate = kAmBnIntegrated rate laws are used to determine concentrations of reactants at certain eras. However, these integrated equations fire only be used after the experimental data is collected. Temperature has an force play on the rates of reactions. Swedish chemist, Svante Arrhenius, discovered that the rate constant of a reaction increased logarithmically in proportion to the reciprocal of the compulsory temperature. This is expressed mathematically ask = Ae-&916E/RTMethod degree centigrade mL of water/ Isopropyl Alcohol were added to a 250 mL Earlenmeyer flask along with 15 drops of phenolphthalein. A buret was washed with soapy water and rinsed with 0.2 M NaOH. The buret was then filled to 0.00 mL. 2.00 mL of NaOH were added to the flask and it was placed into an ice-water can.t-BB was injected into the flask by the lab assistant with this detailed time being noted. The exact time was recorded once again when the dissolver became colorless.About 2 mL of NaOH were added to the solution and the time recorded when this became colorless. This was done until seven time readings were recorded. After the 7th addition of NaOH, the flask was removed from the ice bath and placed in a hot water bath for close to ten minutes. The flask was then removed from the bath and cooled to room temperature. The solution was then titrated to a slight pink color. The volume rea ding of the buret was equal to the total base added during the experiment. This experiment was repeated in recapitulate at room temperature.CH3 CH3CH3 - C - Br + H2O &61664 CH3 - C - OHCH3 CH3T... ...found to be the 1/H graphs. This means that the reaction was a simple hour order reaction.Rate Constant Calculations A. (11.90-5.29)/(2687-160) = 2.62x10-3 B. (10.00-4.65)/(191-25) = 3.22x10-2Activation Energy Calculation ln(k2 k1) = -(&916E/8.314) (1/T2 1/T1) Ea = -8.312 (lnK2 lnK1) / (1/T2 1/T1) = -8.314 (ln 3.22x10-2 ln 2.62x10-3) / (1/298.15 1273.15) = 67.3 KJ/molConclusion This reaction was found to be simple second order. The rate constants were 2.62 x 10-3 at 0 degrees C, and 3.22 x 10-2 at room temperature. The activation energy was calculated to be 67.3 KJ/mol. in that respect were no unusual problems encountered during this experiment. Error in data may be due to lack of ability to record times accurately.