Question

The activation energy for the isomerization ol cyclopropane to propene is 274 kJ/mol. By what factor does the rate of this reaction increase as the temperature rises from 232 to 281 oC? (The factor is the ratio of the rates.)

ohp?attempt-433089 When formic acid is heated, it decomposes to hydrogen and carbon dioxide in a first-order decay: HCOOH(g) →CO2(g) + H2 (g) The rate of reaction is monitored by measuring the total pressure in the reaction container Time (s). .P (torr) 0 50 100 150 200 250 300 220 324 379 408 423 431 435 At the start of the reaction (time = 0), only formic acid is present. What is the formic acid pressure (in torr) when the total pressure is 370? Hint: use Daltons law of partial pressure and the reaction stoichiometry Answer: 70 What is the rate constant (in s)? (To determine the rate, you must use a reactant concentration or pressure. Use the procedure of in the previous question to determine the HCOOH pressure as a function of the total pressure.) Answer: 1.26 What is the half-life (in s)? Answer: 548

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k j R CT12 T-232+273)K: 505K

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