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The following data were reported [from C. N. Hinshelwood and P. J. Ackey, Proc. R. Soc. (Lond)., A115, 215] for a gas-phase constant-volume decomposition of dimethyl ether at 504C in a batch reactor. Initially, only was present. Run 1234 5 (min) 15 38 100 300 1200 1.5 1.25 1.0 0.75 0.5 t (min) 0 5 9 15 22 30 40 60 CA (mol/dm3) 2 1.6 1.35 1.1 0.87 0.70 0.53 0.35 Time (s) 390 777 1195 3155 Total Pressure (mmHg) 408 488 562 799 931 dm3 t CA mol/dm3 ( ) t A BC → CH3 ( )2O 290 Collection and Analysis of Rate Data Chapter 7 (a) Why do you think the total pressure measurement at t 0 is missing? Can you estimate it? (b) Assuming that the reaction is irreversible and goes virtually to completion, determine the reaction order and specific reaction rate k. (Ans.: k = 0.00048 min–1) (c) What experimental conditions would you suggest if you were to obtain more data? (d) How would the data and your answers change if the reaction were run at a higher temperature? A lower temperature?
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The following data were reported [from C. N. Hinshelwood and P. J. Ackey, Proc. R. Soc. (Lond)., A11...
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