Chemistry 18-20

Question 1

Substances that react

Answer 1

Reactions

Question 2

A new substance produced by a reactant

Answer 2

Products

Question 3

Reactions that form gases

Answer 3

Chemical reaction

Question 4

Reactions that form solids

Answer 4

Chemical reaction

Question 5

AQ

Answer 5

Aqueous

Question 6

S

Answer 6

Solid

Question 7

G

Answer 7

Gas

Question 8

Metals are solid

Answer 8

Elements

Question 9

H2,N2,O2,F2,C2

Answer 9

Most diatomic elements (gases)

Question 10

Bromide is a

Answer 10

liquid

Question 11

Iodine is a

Answer 11

Solid

Question 12

Ionic compounds are solid @

Answer 12

room temperature

Question 13

Release energy usually in the form of heat, light or electricity

Answer 13

Exothermic Reactions

Question 14

A chemical reaction that occurs when oxygen reacts rapidly with a substance to form a new substance and gives off energy

Answer 14

Combustion

Question 15

A reaction that absorbs energy

Answer 15

Endothermic reaction

Question 16

Exothermic or endothermic happen at an organisms internal temperature and are almost always helped by enzymes

Answer 16

Biochemical Reactions

Question 17

Photosynthesis

Answer 17

endothermic

Question 18

Cellular respiration

Answer 18

Exothermic

Question 19

All reactions involve the production of new substances with their

Answer 19

own characteristics and properties

Question 20

all reactions involve the

Answer 20

flow of energy

Question 21

When new substances form in chemical reactions

Answer 21

sometimes changes of state can be observed

Question 22

all chemical reaction are consistent to the

Answer 22

law of conservation of mass

Question 23

how chemists recorded chemical reaction

Answer 23

chemical equation

Question 24

The transfer of thermal energy through direct contact between the particles of a substance, without moving the particles to a new location.

Answer 24

Conduction

Question 25

the transfer of thermal energy through the movement of particles

Answer 25

Convection

Question 26

The pressure exerted by the mass of air above any point on warm air is less dense

Answer 26

Atmosphere Pressure

Question 27

Movement of cool air from high pressure to low pressure

Answer 27

Wind

Question 28

Deflection of any object from a straight line path by the rotation of Earth causes moving wind to turn right in the Northern Hemisphere and left in the Southern Hemisphere

Answer 28

Carigles Effect

Question 29

When wind travels from regions near the equator NE and SE by rising current of air

Answer 29

Trade Winds

Question 30

Bonds of fast mobbing air not subject to much friction and are so much faster than wind close to Earth's surface

Answer 30

Jet Streams

Question 31

The amount of energy required to raise the temperature of lg. of substance by 1 degree Celsius

Answer 31

Specific Heat Capacity

Question 32

The amount of thermal energy absorbed or released based on the temp and mass of a substance

Answer 32

Quantity of Thermal Energy

Question 33

Cycle of water molecules constantly moving among the components of the biosphere

Answer 33

Hydrologic Cycle

Question 34

The amount of energy absorbed when 1 mol of substance changes from solid to liquid

Answer 34

Heat of Fusion

Question 35

Energy released when 1 mol of a solid form

Answer 35

Heat of Solidification

Question 36

Energy absorbed when 1 mol changes from liquid to gas

Answer 36

Heat of Vaporization

Question 37

Scottish physician who observed that when a cold object is in a cup of hot water, the object warms up he explained this by suggesting heat was an invisible fluid, called a caloric fluid

Answer 37

Joseph Black

Question 38

That heat and motion were related. He came to his conclusion when he noticed the endless amount of heat generated by the boring of brass canons

Answer 38

Benjamin Thompson

Question 39

Linked mechanic energy to Leibniz's theory of Kinetic and potential energy in moving objects. He suggested that energy which creates mechanic energy. He also thought that mechanical energy was related to the work a system can do

Answer 39

Thomas Young

Question 40

Uses the chemical formula of reactant and products in a chemical equation to represent a chemical reaction

Answer 40

Formula Equation

Question 41

Formula equation showing the identity of each substance involved in a chemical reaction

Answer 41

Skeleton Equation

Question 42

A formula equation that follows the law of conservation of mass

Answer 42

Balanced Equation

Question 43

A reactive element reacts

Answer 43

Single Replacement Reaction

Question 44

Two elements combine to make a new compound

Answer 44

Formation Reaction

Question 45

A formation reaction

Answer 45

Synthesis Reaction

Question 46

Chemical reaction in which a compound breaks apart into its elements

Answer 46

Decomposition Reaction

Question 47

Compound that contains hydrogen and carbon: many gasolines and plastics

Answer 47

Hydrocarbon

Question 48

A reactive element reacts with an ionic compound

Answer 48

Single Replacement Reaction

Question 49

Commonly occur between two ionic compounds

Answer 49

Double Replacement Reaction

Question 50

The quantity that chemists use to measure elements and compounds

Answer 50

Mole (symbol-mol)

Question 51

The number of particles in 1 Mole

Answer 51

Avagrado's Number

Question 52

Mass of one of a substance called the atomic molar mass on periodic table

Answer 52

Molar Mass