Final exam

Question 1

Define energy

Answer 1

Property transferred to a body or a system in the form of heat and light, recognizable in the ability to do work.

Question 2

Define heat flow

Answer 2

Warm - movement increases
Cold - decrease in movement

Question 3

Define specific heat capacity

Answer 3

The specific heat of a substance is the amount of heat (q) required to raise the temperature of one gram of the substance by one degree Celsius

Question 4

Who discovered radioactivity on a rainy day in Paris?

Answer 4

Henri Bacquerel

Question 5

Which type of radiation is most penetrating?

Answer 5

Gamma rays

Question 6

Synthesis reaction (combination)

Answer 6

Reactants are two elements or two simple compounds.

Question 7

Decomposition reaction

Answer 7

Only 1 reactant

Question 8

Combustion reaction

Answer 8

Reactants are oxygen and a hydrocarbon.
Products are CO₂ and H₂O

Question 9

Double replacement (Metathesis)

Answer 9

Reactants are two iconic compounds
Strong acid + Strong Base -> Salt + water
Acid + carbonate -> salt + water + CO₂

Question 10

Single replacement

Answer 10

Reactants are an element and a compound (other than a hydrocarbon)

Question 11

Exothermic process

Answer 11

Gives off heat , feels hot

Question 12

Endothermic process

Answer 12

Absorbs heat , feel cold

Question 13

To add heat to water you make a gas

Answer 13

Exothermic

Question 14

Endothermic processes

Answer 14

Melting, Vaporization, Sublimation

Question 15

Exothermic processes

Answer 15

Condensation, Freezing, Deposition

Question 16

△H

Answer 16

Endothermic

Question 17

-△H

Answer 17

Exothermic

Question 18

Oxidized =

Answer 18

• reducing agent
• loses e-

Question 19

Reduced =

Answer 19

• oxidizing agent
• gains e-

Question 20

Li-> Li⁺

Answer 20

Oxidized

Question 21

Cu²⁺ -> Cu

Answer 21

Reduced

Question 22

Oxidation number for free elements (non combined state)

Answer 22

0
Ex. Na, O₂

Question 23

Oxidation number is equal to ____ for monatomic ions?

Answer 23

The charge on the ion
Ex. Li⁺ = +1
Fe³⁺ = +3

Question 24

The oxidation number of hydrogen is +1 except ____?

Answer 24

When it is bonded to metals in binary compounds. It’s oxidation number = -1
Ex. NaH = -1

Question 25

+1 is oxidation number or charge on ion?

Answer 25

Oxidation number

Question 26

1+ is oxidation number or charge on ion?

Answer 26

Charge on ion

Question 27

1A groups metals are always

Answer 27

+1 oxidation number

Question 28

2A metals oxidation number is always

Answer 28

+2

Question 29

In compounds F is always __?

Answer 29

-1 oxidation number

Question 30

Molecular fluorine, F₂ , oxidation number is always ___?

Answer 30

0

Question 31

In compounds the oxidation number of oxygen is usually

Answer 31

-2

Question 32

Superoxides (O₂ ^- ) , KO₂ what is the oxidation number?

Answer 32

-1/2

Question 33

Hydrogens displace ____ on the periodic table?

Answer 33

The other halogens under them

Question 34

Hydrocarbons examples

Answer 34

Methane (CH₄), Ethane (C₂H₆), Propane (C₃H₈), Butane (C₄H₁₀)

Question 35

Halogens (top to bottom)

Answer 35

Fluorine (F), Chlorine (Cl), Bromine (Br), Iodine (I), Astatine (At), Tennessine (Ts)