Ch.13 - Chemical KineticsWorksheetSee all chapters
All Chapters
Ch.1 - Intro to General Chemistry
Ch.2 - Atoms & Elements
Ch.3 - Chemical Reactions
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Ch.4 - Chemical Quantities & Aqueous Reactions
Ch.5 - Gases
Ch.6 - Thermochemistry
Ch.7 - Quantum Mechanics
Ch.8 - Periodic Properties of the Elements
Ch.9 - Bonding & Molecular Structure
Ch.10 - Molecular Shapes & Valence Bond Theory
Ch.11 - Liquids, Solids & Intermolecular Forces
Ch.12 - Solutions
Ch.13 - Chemical Kinetics
Ch.14 - Chemical Equilibrium
Ch.15 - Acid and Base Equilibrium
Ch.16 - Aqueous Equilibrium
Ch. 17 - Chemical Thermodynamics
Ch.18 - Electrochemistry
Ch.19 - Nuclear Chemistry
Ch.20 - Organic Chemistry
Ch.22 - Chemistry of the Nonmetals
Ch.23 - Transition Metals and Coordination Compounds

Solution: According to collision theory and the Arrhenius concept, which of the following statements about gas-phase chemical reactions are TRUE?i. Reaction rates are proportional to collision frequencyii. The

Solution: According to collision theory and the Arrhenius concept, which of the following statements about gas-phase chemical reactions are TRUE?i. Reaction rates are proportional to collision frequencyii. The

Problem

According to collision theory and the Arrhenius concept, which of the following statements about gas-phase chemical reactions are TRUE?

i. Reaction rates are proportional to collision frequency

ii. The number of effective collisions at a given temperature is related to both the kinetic energy and orientation of the reacting molecules or atoms

iii. As the temperature increases, the number of species reaching the transition state of the rate-determining step increases

iv. As the temperature increases, the activation energy of a reaction remains constant.

 

(a) (i) and (ii)

(b) (ii) and (iii)

(c) (i), (ii), and (iii)

(d) (ii), (iii), and (iv)

(e) All of the statements are correct

Solution

We’re being asked to determine which of the given statements about gas-phase chemical reactions are true based on the collision theory and Arrhenius concept.


In collision theory, we look at all the different factors that have to be taken into account whenever reactant molecules collide in order for products to be successfully created.


This involves the Arrhenius Equation shown below:

k =A·e-EaRT

A = Frequency Factor
Ea = Energy of Activation
R = Gas Constant = 8.314 J/(mol∙K)
T = Temperature

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