Matter and Change 1.12-1.18

Chemical Reaction

• a process in which substances undergo a change a return to the same substances.

• a process in which some substances change into different substances.

Substances that start a chemical reaction are called ________.

• reactants

• products

Substances that are produced in the reaction are called______.

• reactants

• products

Reactants and products can be elements or compounds.

• True

• False

In____________, more energy is released when bonds form in products than is used to break bonds in reactants. These reactions _____________ the environment, often in the form of heat or light.

• exothermic reactions, release energy to

• exothermic reactions, absorb energy from

• endothermic reactions, absorb energy from

• endothermic reactions, release energy to

In ___________, more energy is used to break bonds in reactants than is released when bonds form in products. These reactions _________________ the environment.

• exothermic reactions, release energy to

• exothermic reactions, absorb energy from

• endothermic reactions, absorb energy from

• endothermic reactions, release energy to

A+B → C

• Synthesis

• Decomposition

• single replacement

• double replacement

• Combustion

AB → A + B

• Synthesis

• Decomposition

• single replacement

• double replacement

• Combustion

A+BC → B+ AC

• Synthesis

• Decomposition

• single replacement

• double replacement

• Combustion

AB+ CD → AD + CB

• Synthesis

• Decomposition

• single replacement

• double replacement

• Combustion