Chapter 12 - Properties of Water

Question 1

define Latent heat of fusion

Answer 1

the amount of heat/energy needed to change a fixed amount of a solid to a liquid

Question 2

define latent heat of vaporisation

Answer 2

the amount of heat/energy needed to change a fixed amount of a liquid to a gas

Question 3

define specific heat capacity

Answer 3

refers to the amount of heat/energy needed to raise the temperature of 1 gram of a substance by 1 deg.celsius

Question 4

formula for specific heat capactiy

Answer 4

energy=mass x specific heat capacity x the difference of temperature

Question 5

unit of mass in mcat formula

Answer 5

grams

Question 6

unit of temperature in mcat formula

Answer 6

deg.celsius

Question 7

unit of energy in mcat formula

Answer 7

kJ

Question 8

properties of water

Answer 8

high points (hydrogen bonding)

high latent heat values (hydrogen bonding)

high spc (hydrogen bonding)

expansion upon freezing

dissolves substances (high polarity)

Question 9

define hydrophillic

Answer 9

polar molecules dissolving in water due to the polarity being stronger than the cohesive forces of water

Question 10

define hydrophobic

Answer 10

non- polar molecules dissolving in water due to the polarity being weaker than the cohesive forces of water

Question 11

define capillary action

Answer 11

where water molecules adhere to molecules of a substance and then cohere to other water molecules, drawing them up into the rest of the water.