18. For the reaction: 4A + B→2C + 2DWhich of the following statements is not correct?a. The rate of disappearance of B is one fourth the rate of disappearance of A.b. The rate of appearance of C is one half the rate of disappearance of A.c. The rate of disappearance of C is one half the rate of consumption of A.d. The rate of formation of C and D are equal.19. The collision theory of chemical reactions maintains thata. A chemical reaction occurs with every molecular collision.b. Reactions in the gas phase are always first order.c. Reaction rates are of the order of molecular speeds.d. Rate is directly proportional to the number of collisions per second.

In rate of the reaction, negative sign is used to show that the reactants are decreasing and…

18. For the reaction: 4A + B →→2C + 2D Which of the following statements is not correct? a. The rate of disappearance of B is one fourth the rate of disappearance of A. b. The rate of appearance of C is one half the rate of disappearance of A. c. The rate of disappearance of C is one half the rate of consumption of A. d. The rate of formation of C and D are equal.

18. For the reaction: 4A + B →→2C + 2D Which of the following statements is not correct? a. The rate of disappearance of B is one fourth the rate of disappearance of A. b. The rate of appearance of C is one half the rate of disappearance of A. c. The rate of disappearance of C is one half the rate of consumption of A. d. The rate of formation of C and D are equal.

Chemistry

9th Edition

ISBN:9781133611097

Author:Steven S. Zumdahl

Publisher:Steven S. Zumdahl

Chapter12: Chemical Kinetics

Section: Chapter Questions

Problem 5ALQ: Consider the following statements: In general, the rate of a chemical reaction increases a bit at...

See similar textbooks

Similar questions

. What does the activation energy for a reaction represent? How is the activation energy related to whether a collision between molecules is successful?
Consider the reaction of ozone and nitrogen monoxide to form nitrogen dioxide and oxygen. O3(g) + NO(g) NO2(g) + O2(g) Which of the following orientations for the collision between ozone and nitrogen monoxide could perhaps lead to an effective collision between the molecules? (a) (b) (c) (d)
The reaction NO(g) + O,(g) — NO,(g) + 0(g) plays a role in the formation of nitrogen dioxide in automobile engines. Suppose that a series of experiments measured the rate of this reaction at 500 K and produced the following data; [NO] (mol L ’) [OJ (mol L 1) Rate = -A[NO]/Af (mol L_1 s-1) 0.002 0.005 8.0 X 10"'7 0.002 0.010 1.6 X 10-'6 0.006 0.005 2.4 X IO-'6 Derive a rate law for the reaction and determine the value of the rate constant.
How does an increase in temperature affect rate of reaction? Explain this effect in terms of the collision theory of the reaction rate.
Consider the following statements: In general, the rate of a chemical reaction increases a bit at first because it takes a while for the reaction to get warmed up. After that, however, the rate of the reaction decreases because its rate is dependent on the concentrations of the reactants, and these are decreasing. Indicate everything that is correct in these statements, and indicate everything that is incorrect. Correct the incorrect statements and explain.
One of the concerns about the use of Freons is that they will migrate to the upper atmosphere, where chlorine atoms can be generated by the following reaction: CCl2F2(g)Freon-12hvCF2Cl(g)+Cl(g) Chlorine atoms can act as a catalyst for the destruction of ozone. The activation energy for the reaction Cl(g) + O3(g) ClO(g) + O2(g) Is 2.1 kJ/mol. Which is the more effective catalyst for the destruction of ozone, Cl or NO? (See Exercise 75.)
Substances that poison a catalyst pose a major concern for many engineering designs, including those for catalytic converters. One design option is to add materials that react with potential poisons before they reach the catalyst. Among the commonly encountered catalyst poisons are silicon and phosphorus, which typically form phosphate or silicate ions in the oxidizing environment of an engine. Group 2 elements are added to the catalyst to react with these contaminants before they reach the working portion of the catalytic converter. If estimates show that a catalytic converter will be exposed to 625 g of silicon during its lifetime, what mass of beryllium would need to be included in the design?
How do chemists envision reactions taking place in terms of the collision model for reactions? Give an example of a simple reaction and how you might envision the reaction’s taking place by means of a collision between the molecules.
If a textbook defined a catalyst as "a substance that increases the rate of a reaction," would that definition be adequate?
use the kineticmolecular theory to explain why an increase in temperature increases reaction rate.
. Account for the increase in reaction rate brought about by a catalyst.