Final

Question 1

specific heat

Answer 1

The amount of energy required to raise the temperature of 1 gram of a substance by 1 degree celsius.

Question 2

Kelvin

Answer 2

A unit of temperature with a freezing point of 273 and a boiling point at 373 and has the same size degrees as celsius.

Question 3

Temperature

Answer 3

A measure of the average amount of kinetic energy of the atoms or molecules in an object. Measured in Kelvins, Fahrenheit, and celsius.

Question 3

Temperature

Answer 3

A measure of the average amount of kinetic energy of the atoms or molecules in an object. Measured in Kelvins, Fahrenheit, and celsius.

Question 4

Hypothesis

Answer 4

A tentative explanation for something or a possible answer to a scientific question.

Question 5

ionic bond

Answer 5

A chemical compound that forms when 1 metal and a nonmetal bond by transferring electrons.

Question 6

Energy

Answer 6

A measure of a systems ability to change or create change in other systems. Measured in Joules.

Question 7

gram

Answer 7

SI unit for mass

Question 8

Matter

Answer 8

Anything that has mass and takes up space

Question 9

Chemical

Answer 9

Property that can only be observed when one substance changes into a different substance–Such as irons tendency to rust.

Question 10

absolute zero

Answer 10

The temperature at which no more energy can be removed from matter and the molecular motion is zero or as close to zero as allowed by quantum theory.

Question 11

Fahrenheit

Answer 11

The temperature scale on which water freezes at 32 degrees and boils at 212 degrees with 180 degrees between them.

Question 12

pure substance

Answer 12

A kind of matter that cannot be separated into another substance by physical means such as a single element or compounds.

Question 13

dilute

Answer 13

contains a small amount of solute in comparison to solvent.

Question 14

extensive property

Answer 14

a property that depends on the amount of matter in a sample

Question 15

heat of vaporization

Answer 15

The amount of energy required for the liquid at its boiling point to become a gas. This takes place at a constant temperature and pressure.

Question 16

Accuracy

Answer 16

A description of how close a measurement is to the true value of the quantity measured.

Question 17

Law of Conservation of Mass

Answer 17

Law that states that energy,matter, or mass can never be created or destroyed. It can only be converted from one form to another.

Question 18

Compound

Answer 18

A substance made up of atoms of two or more different elements joined by chemical bonds

Question 19

moles

Answer 19

The amount of any substance that contains 6.02 x 10^23 particles of that substance or the average atomic mass in grams is = to one of these for any element.

Question 20

Volume

Answer 20

The amount of space having length width and height.

Question 21

covalent bond

Answer 21

A chemical compound or type of chemical bond that forms when two nonmetals react and share 1 2 or 3 pairs of electrons. Consists of molecules.

Question 22

Celsius

Answer 22

The temperature scale on which water freezes at 0 degrees and boils at 100 degrees.

Question 23

molar mass or formula mass

Answer 23

The mass of one mole of a compound with a given chemical formula mass.

Question 24

atom

Answer 24

The smallest part of an element that can still retain the properties of the element. A single unit of an element.

Question 25

Solute

Answer 25

Any substance in a solution that gets dissolved. This is often a solid for example salt dissolving in water.

Question 26

Period

Answer 26

The horizontal rows in the periodic table.

Question 27

Precision

Answer 27

a measure of how close a series of measurements are to one another

Question 28

Element

Answer 28

A unique kind of atom that differs in the amount of protons. Found in many different groups on the periodic table.

Question 29

Theory

Answer 29

A scientific explanation that is supported by evidence.

Question 30

Molecule

Answer 30

A neutral group of atoms that are covalently bonded together.

Question 31

atomic number

Answer 31

The amount of protons that are found in the nucleus. This number is unique to each different element

Question 32

Molarity

Answer 32

the number of moles of solute per liter of solution.

Question 33

concentrated solution

Answer 33

solution containing a large amount of solute compared with the amount of solvent present

Question 34

Mass

Answer 34

A measure of the amount of matter in an object. Unit is grams or kilograms.

Question 35

homogeneous

Answer 35

A solution that is the same throughout. Any sample would have the identical composition as another sample.

Question 36

intensive property

Answer 36

a physical property that does not depend on the amount of matter present. An example is color, boiling point, or concentration.

Question 37

Heat of fusion

Answer 37

Amount of energy required to change a substance from the solid phase to the liquid phase. This takes place at a constant temperature and pressure.

Question 38

heterogeneous mixture

Answer 38

A mixture of substances that IS NOT uniform throughout. Samples taken from it may not be the same.

Question 39

Solvent

Answer 39

The substance that takes up the largest amount of a solution. This is usually a liquid and mostly water.

Question 40

System

Answer 40

An interrelated group of matter and energy that we choose to investigate.

Question 41

Joule

Answer 41

The fundamental unit of energy and heat

Question 42

Brownian motion

Answer 42

The erratic and jerky movement of tiny particles suspended in water, due to random impacts of individual molecules in thermal motion.