Chapter 21 Vocab

Question 1

Reactant

Answer 1

The substances that react

Left side of arrow

Question 2

Product

Answer 2

The new substances that are produced

Question 3

Chemical Equation

Answer 3

A way to describe a chemical reaction using chemical formulas and other symbols

Question 4

Combustion Reaction

Answer 4

Occurs when a substance reacts with oxygen to produce energy in the form of heat and light

Question 5

Synthesis Reaction

Answer 5

Two or more substances combine to form another substance

Question 6

Decomposition reaction

Answer 6

Occurs when one substance breaks down into two or more substances

Question 7

Single-Replacement Reaction

Answer 7

A+BC—>AC+B

One element replaces another in a compound

Question 8

Double-Replacement Reaction

Answer 8

The positive ion of one compound replaces the positive ion of the other to form two new compounds
AB+CD—->AD+CB

Question 9

Exergonic Reaction

Answer 9

Release energy

Question 10

Exothermic Reaction

Answer 10

Release heat

Question 11

Endergonic Reaction

Answer 11

Requires more energy (consumes)

Question 12

Endothermic Reaction

Answer 12

Absorbs heat

Question 13

Coefficient

Answer 13

that goes in front of reactants and products

Question 14

Subscript

Answer 14

small # that follows reactants and products