chem test vocab

Question 1

heat

Answer 1

The energy transferred between objects that are at different temperatures

Question 2

temperature

Answer 2

average kinetic energy of all the atoms or molecules of that substance

Question 3

phase change

Answer 3

when matter changes from one state to another

Question 4

kinetic energy

Answer 4

a form of energy that an object or a particle has by reason of its motion

Question 5

system

Answer 5

a quantity of matter or a region in space that is of interest

Question 6

surroundings

Answer 6

The mass or region outside the system

Question 7

endothermic

Answer 7

Absorbs heat/energy

Question 8

exothermic

Answer 8

Releases heat/energy

Question 9

thermal equilibrium

Answer 9

when substances approach the same temperature, and in the absence of loss to other objects, they will maintain a constant temperature

Question 10

melting

Answer 10

solid to liquid (endothermic)

Question 11

freezing

Answer 11

liquid to solid (exothermic)

Question 12

Vaporization

Answer 12

liquid or solid to gas (endothermic)

Question 13

boiling

Answer 13

liquid to gas (endothermic)

Question 14

Evaporation

Answer 14

immediate change from a liquid to gas (endothermic)

Question 15

Condensation

Answer 15

phase change from gas to liquid (exothermic)

Question 16

sublimation

Answer 16

solid state to gas state without passing through the liquid state

Question 17

energy

Answer 17

a part of a system of particles that is stored in the bonds of chemical compounds

Question 18

deposition

Answer 18

gas to solid (exothermic)

Question 19

thermal insulator

Answer 19

prevents heat from moving from one place to another

Question 20

thermal conductor

Answer 20

Allows the transfer of heat energy through the material

Question 21

conduction

Answer 21

the process in which heat energy is transmitted through neighboring atoms or molecules

Question 22

Convection

Answer 22

The transfer of heat by the movement of a fluid

Question 23

Radiation

Answer 23

The transfer of energy by electromagnetic waves

Question 24

vaporization or condensation

Answer 24

Q = m∆Hvap

Question 25

melting or freezing

Answer 25

Q = m∆Hfus