Portage Learning CHEM 104 Module 1 | Study Guide & Practice Questions 2026/2027

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PORTAGE CHEM 104 MODULE 1 STUDY
GUIDE
Kinetics - CORRECT ANSWER-the study of rates of reactions and how they are
influenced by certain factors

Influences Reactions Rates - CORRECT ANSWER-Concentration, temperature,
catalysts, surface area

Temperature/Reaction Rate - CORRECT ANSWER-Increase, higher temperature
provides higher kinetic energy

Catalyst/Reaction Rate - CORRECT ANSWER-Increase, without being
consumed

Surface Area/Reaction Rate - CORRECT ANSWER-Increase, increased surface
area of particles increases reaction rate because solids only react at their
surfaces (grinding solid into fine powder)

Concentration/Reaction Rate - CORRECT ANSWER-Increase, provides more
reacting particles to undergo reaction

Reaction Rate - CORRECT ANSWER-Increase in molar concentration of product
per unit of time or the decrease in molar concentration per unit of time

Reaction Rate Units - CORRECT ANSWER-moles per liter per second (mol/L*s)

Reaction Rate Equation - CORRECT ANSWER-Change in concentration/change
in time
(products=positive, reactants=add negative sign)

Average Rate - CORRECT ANSWER-Determined by using initial and final
concentrations and initial and final times so that the result measures the rate over
the entire reaction




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Instantaneous Rate - CORRECT ANSWER-The change in concentration of
reactants (or products) divided by a very short period of time

Instantaneous Rate Decreases... - CORRECT ANSWER-Decreases, as reaction
proceeds, concentration of reactant becomes smaller due to consumption of
reactants as reaction takes place

Early Instantaneous Rate - CORRECT ANSWER-The change in concentration of
reactants (or products) divided by a very short period of time near the beginning
of the reaction

Late Instantaneous Rate - CORRECT ANSWER-The change in concentration of
reactants (or products) divided by a very short period of time at the end of the
reaction

Relative Values of Average Rate, Early Instantaneous Rate, and Late
Instantaneous Rate - CORRECT ANSWER-The early instantaneous rate will be
greater (most reactant) than the late instantaneous rate or the average rate. The
late instantaneous rate will be smaller (less reactant) than the early
instantaneous rate or the average rate.

Rate Law - CORRECT ANSWER-Mathematical equation that describes the
dependence of the reaction rate on the concentrations of some of the reactants

Equation for Rate Law - CORRECT ANSWER-rate = k [A]^x[B]^y

K - CORRECT ANSWER-rate constant

order with respect to a reactant - CORRECT ANSWER-Exponent of
concentration in rate law

Zero Order - CORRECT ANSWER-Rate does not change if the concentration of
that reactant is changed (uncommon)

Experimentally - CORRECT ANSWER-How rate law must be determined




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