Q2 Factors affecting the rate of reaction Flashcards
is a measure of how much something changes within a specified amount of time.
rate
is used to relate the properties of particles to the rates of chemical reactions.
Collision Theory
An ________ of oxygen and
hydrogen molecules produces water
molecules.
effective collision
An ________ of oxygen and hydrogen molecules produces no reaction; the reactants bounce apart unchanged.
innefective collision
The minimum energy that colliding
particles must have in order to react is
called the
activation energy
When two reactant particles collide, they may form an
activated complex
is an unstable arrangement of atoms that forms for a moment at the peak of the activation-energy
barrier.
activated complex
The ________ forms only if the
colliding particles have enough energy and if
the atoms are oriented properly
activated complex
The lifetime of an activated complex is
typically about _______seconds
10 -¹³
the activated complex is sometimes
called the
transition state
________
reaction
absorbs heat
endothermic
_______
reaction
releases heat.
exothermic
The frequency of collisions increases
along with the percentage of particles that
have enough kinetic energy to slip over
the activation-energy barrier.
Temperature
The number of particles in a given volume
affects the rate at which reactions occu
concentration
The total surface area of a solid or liquid
reactant affects the rate of a reaction.
particle size
