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