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- Coal gasification produces an easily-transportable, clean-burning combination of carbon monoxide and hydrogen from coal by reacting it with steam, like this: C(s) + H₂O(g) → CO(g) + H₂(g) - - Suppose an engineer decides to study the rate of this reaction. He prepares four reaction vessels with 95.3 g of solid carbon and 13.5 g of steam each. The volume and temperature of each vessel is shown in the table below. Arrange the reaction vessels in decreasing order of initial rate of reaction. In other words, select a "1" next to the vessel in which the engineer can reasonably expect the initial rate of reaction to be highest, a "2" next to the vessel in which the initial rate of reaction would be next highest, and so on. vessel volume temperature A B C D 5.0 L 5.0 L 5.0 L 5.0 L 360. °C 370. °C 390. °C 340. °C X initial rate of reaction ? ? ? ? ŚA 10-mm cube of copper metal is placed in 250 mL of 12 M nitric acid at 25°C and the reaction below occurs: Cu(s) + 4H+(aq) + 2NO3(aq) → Cu2+(aq) +2NO2(g) + 2H20(I) At a particular instant in time, nitrogen dioxide is being produced at the rate of 2.3 × 10^-4 M/min. AT this same instant, what is the rate at which hydrogen ions are being consumed in M/min? Report you answer with 5 places past the decimal1. II II Time, Time, Time, [A], M [A], M [A], M S 1.00 0.78 0.61 0.47 0.37 0.22 0.14 0.08 1.00 0.75 0.50 0.25 0.00 0. 25 50 75 100 1.00 0.80 0.67 0.57 0.50 0.40 25 25 50 75 50 75 100 150 200 100 150 200 250 0.33 0.29 250 What is the approximate rate of reaction at t= 75 s for the (a) zero-order, (b) first-order, (c) second-order reaction?
- Coal gasification produces an easily-transportable, clean-burning combination of carbon monoxide and hydrogen from coal by reacting it with steam, like this: C(s) + H₂O(g) → CO(g) +H₂(g) Suppose an engineer decides to study the rate of this reaction. He prepares four reaction vessels with 95.1 g of solid carbon and 12.3 g of steam each. The volume and temperature of each vessel is shown in the table below. Arrange the reaction vessels in decreasing order of initial rate of reaction. In other words, select a "1" next to the vessel in which the engineer can reasonably expect the initial rate of reaction to be highest, a "2" next to the vessel in which the initial rate of reaction would be next highest, and so on. vessel volume temperature A B C D 4.0 L 2.0 L 4.0 L 2.0 L 300, "C 310, "C 310 °C 330. "C X initial rate of reaction P ? ? ? G v VSuppose a multi-step A + 2B mechanism: -------> AB2 reaction takes place by the following The rate law expression must be: Rate =Classify the following processes according to their rates as fast, slow or very slow. The souring of milk stored in a refrigerator. The cooking of an egg in boiling of water. The ripening of a banana stored at room temperature. The rising of bread dough in a warm room. The melting of butter put into a hot pan. The change of apple juice to cider. The movement of sound from a slammed door to your ear. The ringing of your phone after you steps into the shower. The combustion of gasoline in the engine of your car. The perceived passage of time when you are doing something enjoyable.
- Classify the following processes according to their rates as very slow, slow, or fast: a.The souring of milk stored in a refrigerator b.The cooking of an egg in boiling water c.The rusting of a shovel left in the garden over the winter d.The growing of corn during a warm summer e.The burning of a lighted match.0.003 ? 0.00218 0.002 - M 0.001 5 10 15 20 25 30 seconds created x10 Is H,0, being created or destroyed by the chemical destroyed reaction? neither created nor destroyed If f H,O, is being created or destroyed, what is the rate at which it is being created or destroyed 7 seconds after the reaction starts? Round your answer to 2 significant digits. Also be sure your answer has the correct unit symbol. If H,O, is being created or destroyed, what is the average rate at which it is being created or destroyed during the first 7 seconds of the reaction? Round your answer to 2 significant digits. Also be sure your answer has the correct unit symbol. 미A+B → C+D (In this equation A, B, C and D stand for some unknown chemical formulas.) Here is an energy diagram for the reaction: energy (kJ/mol) 400 300- 200. 100- 0 C + D s A + B reaction coordinate Use the energy diagram to answer these questions. What is the heat of reaction? Is the reaction exothermic or endothermic? Can you determine the activation energy? Can you determine the activation energy of the reverse reaction? C+DA+B kJ/mol Exothermic Endothermic Neither Yes, it's kJ/mol No. Yes, it's kJ/mol No.
- Alabama Instruments Company has set up a production line to manufacture a new calculator. The rate of production of these calculators after t weeks is dx 180 dt (t + 24)2 calculators per week. Production approaches 5,700 per week as time goes on, but the initial production is lower because of the workers' unfamiliarity with the new techniques. Find the number of calculators produced from the beginning of the third week to the end of the fourth week. Round the answer to the nearest integer. а. 8281 b. 8781 c. 8881 d. 8681 е. 8581Peroxynitric acid (HOONO2) is an unstable molecule that decomposes to nitric acid and oxygen: 2HOONO2(aq) → 2HNO3(aq) + O2(g)When the concentration of peroxynitic acid is graphed against time, the resulting plot is curved, but if the logarithm of this concentration is plotted, we instead get a straight line. Based on this, which statement is true? a) This decay is a second order in peroxynitric acid. b) The slope of the straight-line graph is the rate constant. c) One needs the concentration of peroxynitric acid to calculate its half-life. d) The rate law appears to be of the form -Δ[HOONO2]/Δt = k[HOONO2].0.005- 50 100 150 200 250 300 seconds created ola Is HCO,H being created or destroyed by the chemical destroyed action? Ar neither created nor destroyed If HCO,H is being created or destroyed, what is the rate at which it is being created or destroyed 70 seconds after the reaction starts? Round your answer to 2 significant digits. Also be sure your answer has the correct unit symbol. If HCO,H is being created or destroyed, what is the average rate at which it is being created or destroyed during the first 70 seconds of the reaction? Round your answer to 2 significant digits. Also be sure your answer has the correct unit symbol.