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: A student studied the kinetics of the reaction  C2H4(g) → C2H2(g) + H2(g)  by monitoring the C2H4 concentration (in moles/L) as a function of time. The student made a plot of ln [C2H4] against t. The plot was a straight line with the equation y = −0.618x − 1.427 (where y = ln [C2H4] and x = t). What was the initial C 2H4 concentration? a) 0.62 moles/L b) 4.17 moles/L c) 0.24 moles/L d) 0.78 moles/L e) 1.62 moles/L

Solution: A student studied the kinetics of the reaction  C2H4(g) → C2H2(g) + H2(g)  by monitoring the C2H4 concentration (in moles/L) as a function of time. The student made a plot of ln [C2H4] against t. Th

Problem

A student studied the kinetics of the reaction 

C2H4(g) → C2H2(g) + H2(g) 

by monitoring the C2H4 concentration (in moles/L) as a function of time. The student made a plot of ln [C2H4] against t. The plot was a straight line with the equation y = −0.618x − 1.427 (where y = ln [C2H4] and x = t). What was the initial C 2H4 concentration?

a) 0.62 moles/L

b) 4.17 moles/L

c) 0.24 moles/L

d) 0.78 moles/L

e) 1.62 moles/L