Chemical Reactions and Equations
high
The activation some reactions is so blank that more energy is needed to start the reaction
inhibitors
substances that slow down or stop a chemical reactions
exposed
surface area is the amount of blank outer area of a solid
collide
Chemical reactions occur faster if the particles blank more often or if the particles move faster when they blank
catalyst
A blank increases reactions rate by lowering the activation of energy of a reaction and do not change the reactants or the products of the reaction
changed
A catalyst is not itself permanently changed during a chemical reaction
energy
All reactions require blank to start the breaking of bonds
concentration
An increase in blank also increases reaction rate because there are more particles to collide with each other
Activation energy
Blank is the minimum amount of energy that is needed to start a chemical reaction
Endothermic
Blank reactions are chemical reactions that absorb thermal energy
Exothermic
Blank reactions are chemical reactions that release thermal energy
absorbs
Breaking a chemical bond blank energy from the surroundings
bonds
Energy released in a chemical reactions comes from chemical energy that is contained in chemical blank
pressure
For gases, increased blank pushes particles closer together and more collisions occur
releases
Forming a chemical bond blank energy to the surroundings
less
In these reactions blank energy is required to break the bonds of the reactants than is released when products form
reactants
In these reactions, more energy is required to break the bonds of the blank than is released when products form
particles
Increased surface area increases the rate of reactions because more blank on the surface of a solid come in contact with the blank of another substance
absorb
Most chemical reactions release more energy than they blank
release
Some chemical reactions absorb more energy than they blank
start
Some chemical reactions do not blank by themselves
surroundings
The activation energy of some reactions is so low that enough energy to start the reactions comes from the blank
conserved
The energy in chemical bonds and the energy absorbed or released is always blank
speed
The rate of a reactions is the blank at which it occurs
enzyme
a catalyst that speed up chemical reactions in living cells
surface
blank area can affect the rate of reaction
temperature
blank can affect the rate of reaction because at higher blank particles move faster and particles collide more often