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- North Farmington High School
- Accelerated Chemistry B
- Szegedi
- Chemical kinetics
Chemical kinetics
Accelerated Chemistry B with Szegedi at North Farmington High School
About this deck
By: Mara Chaben
Created: 2011-03-14
Size: 27 flashcards
Views: 19
Created: 2011-03-14
Size: 27 flashcards
Views: 19
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define chemical kinetics:
the study of the rates of a chemical reaction
reaction rate and temperature are _________ proportional
directly
reaction rate and concentration are _____________ proportional
directly
when you heat a substance what happens to the temperature?
increases
what is on the bottom and right side of the exo/endothermic graphs?
bottom- course of reaction
right-energy
What does an exothermic graph look like?
goes up and then down low
What does and endothermic graph look like?
goes up and stays high
Where is the activation of energy located on both endo and exo graphs?
between the reactants line and the top of the curve
what is activation energy?
energy required to start a reaction
the effect of temperature increases on the rate of reaction is the result of...
a greater number of collisions of particles AND more energetic and effective collisons
substances that speed up chemical reactions but are not permanently changed themselves are called
catalysts
in an endothermic reaction, such as the decomposition of baking soda to produce carbon dioxide, raising the temperature makes the reaction happen faster because...
more of the particles have reached the activation energy
the increase in reaction rate that accompanies increases in concentration is attributed to
an increased frequency of collisions
changes in the reaction rates are explained using
collision theory
the pulverizing of solid substances to increase the reaction rate is effective because grinding the solid
increases the surface area
the difference in potential energy of the reactants and products of a chemcial reaction is the
heat released or absorbed
most chemcial reactions occur as a result of a series of collisions between
two particles
one of the factors that influence the rate of reaction is the nature of the reactants. as you go across a period of the periodic table, the metal reactivity
decreaseswhi
the activated complex is
a transition state between the reactants and products
a catalyst that is in the same state as the reactants ics called a
homogeneous catalyst
state the collision theory summary:
reactions substances must collide, reacting substances must collide with the correct orientation, reaction substances must collide with sufficient energy to form the activated complex
define activation energy
the minimum amount of energy that reacting particles must have to form the activated complex
what are the 4 factors that influence the rate of a chemical reaction?
the nature of reactants, concentration, surface area, and temperature
what is an enzyme
a biological catalyst
how does a catalyst increase the rate of a chemical reaction?
by finding an altranate pathway for the reaction to occur
define inhibitor
a substance that slows down reaction rates
define heterogeneous catalysts
exists in a physical state different than that of the reaction it catalyzes
About this deck
By: Mara Chaben
Created: 2011-03-14
Size: 27 flashcards
Views: 19
Created: 2011-03-14
Size: 27 flashcards
Views: 19
About StudyBlue
STUDYBLUE makes things that make you better at school.
Things like online flashcards with photos and audio.
Things like personalized quizzes and friendly reminders about when (and what) to study next.
Think of it as a digital backpack™: access to all of your study materials online and on your phone.
STUDYBLUE exists to make studying efficient and effective for every student, for free. Join us.
“I have been getting MUCH better grades on all my tests for school. Flash cards, notes, and quizzes are great on here. Thanks!”
Kathy
Kathy