State of mater

Question 1

molecules make up all matter, and above absolute zero, they are in constant ________

Answer 1

motion

Question 2

the amount of movement with in a molecule (and atom) increases as it gains _____ and decrease as it loses _____

Answer 2

heat(or energy or thermal energy)

Question 3

amount of heat needed to transition between states will not

Answer 3

break the bonds

Question 4

0 Kelvin =-273 C

Answer 4

Above absolute zero

Question 5

how is heat measured

Answer 5

units of calories or joules

Question 6

the temperature at which a phase change of a substance occurs depends on

Answer 6

its intermolecular forces (molecule to molecule attractions)

Question 7

what two conditions do substance depend on

Answer 7

temperature and pressure

Question 8

solid phase

Answer 8

a state of matter that will retain its shape and density when not contained

Question 9

melting phase

Answer 9

change of any substance from a solid to liquid

Question 10

freezing phase

Answer 10

transition of liquid to solid

Question 11

liquid is a state of matter that has definite ____ but not definite ____

Answer 11

volume; shape

Question 12

boiling point

Answer 12

transition of a substance from liquid to gas when it acquires enough energy to reach boiling point

Question 13

evaporation

Answer 13

defining the phase change from liquid to gas, but DOES NOT require that substance to acquire enough energy to reach boiling point

Question 14

gas state

Answer 14

state of matter composed of molecules in constant random motion

Question 15

condensation

Answer 15

transition of gas to liquid when it loses enough energy

Question 16

phase diagram

Answer 16

is a graph of physical states of substance under varying temperature and pressure

Question 17

triple point

Answer 17

is the temperature and pressure at which solid liquid and gas phases of pure substance coexist

Question 18

sublimation

Answer 18

transition of a substance from solid to gas without passing through liquid state

Question 19

deposition

Answer 19

transition of a substance from gas to solid without passing through the liquid state

Question 20

critical point

Answer 20

substance co-exisits in both its liquid and gas states