Phase Changes

Question 1

What is another term for melting?

Answer 1

fusion

Question 2

What is fusion?

Answer 2

solid to liquid

Question 3

What is another term for boiling?

Answer 3

vaporization

Question 4

What is vaporization?

Answer 4

liquid to gas

Question 5

What is sublimation?

Answer 5

solid to gas

Question 6

What is the connecting characteristic of fusion, vaporization, and sublimation?

Answer 6

They consume heat, ENDOthermic
H>0
S>0
**All molecules are changing to a state where are they are LESS organized

Question 7

What is crystallization?

Answer 7

liquid to solid

Question 8

What is condensation?

Answer 8

gas to liquid

Question 9

What is deposition?

Answer 9

gas to solid

Question 10

What is the connecting characteristic of crystallization, condensation, and deposition?

Answer 10

They produce heat. EXOthermic
H<0
S<0
** All molecules become MORE organized

Question 11

• Delta H is endothermic or exothermic?

Answer 11

exothermic, produces heat,

H<0

Question 12

+ Delta H is endothermic or exothermic?

Answer 12

endothermic, consumes heat, H>0

Question 13

What are the 4 physical state subscript notation?

Answer 13

(s) = solid or solid precipitate
(g) = gas
(l) = liquid
(aq) = aqueous, dissolved in water