Chapter 3 Water Specific heat of Water heat
- Slides: 18
Chapter 3 Water
Specific heat of Water • heat = total amount of KE in molecular movement. • temperature = measures the intensity of heat due to the average KE of the molecules. • Specific heat = the amount of heat that must be lost or gained to raise a 1 g substance 1 o. C.
• Waters’ high specific heat causes it to change temperature less when it absorbs or loses a given amount of heat. • Waters’ specific heat tends to stabilize the ocean temperature creating a favorable environment.
Heat of Vaporization • heat of vaporization = quantity of heat a liquid must absorb for 1 g to be converted from liquid to gas. • high heat of vaporization causes evaporative cooling helping to maintain
States of water • Ice is less dense than liquid (10% at 4 o. C), due to hydrogen bonding. • The characteristic of ice being less dense than liquid provides continued life for aquatic habitats year round.
Solid liquid Gas
Salt dissolved in water HYDRATION SHELL
Dissociation of water • This is a reversible reaction that will reach a state of dynamic equilibrium where the concentration of water exceeds the concentration of the products. • The concentration of each ion in pure water is [10 -7]M (25 o. C). • Although dissociation is rare, changes in the concentration of these reactive molecules can have drastic affects on a cell proteins and molecules.
p. H • In any aqueous solution [H+][OH-] = 10 -14 Molar concentration Therefore [H+] = 10 -7 M and [OH-] = 10 -7 M If enough acid is added to increase [H+] = 10 -5 M then [OH-] = 10 -9 M
• The p. H scale compresses the range of H+ and OH- by employing logarithms. • The p. H scale is defined as the negative logarithm (base 10) of the H+ concentration p. H = -log [H+] **In a neutral solution -log 10 -7 = -(-7) = 7 ***Each p. H unit represents a 10 x difference in H+ / OH- concentrations!!!!!!
Buffers • Buffers minimize changes in the concentration of H+/OH- in a solution. • Buffers accept H+ from the solution when in access and donate to solution when depleted ie. H 2 CO 3 HCO 3 - + H+ acid H+ acceptor
Dissociation of water
- Specific heat capacity
- Latent heat definition
- Water and water and water water
- Q in thermodynamics
- Specific heat
- Heat capacity units
- Unit of heat capacity
- Properties of water key
- Specific heat of water
- Specific heat of water and land
- Specific weight
- Plummet method
- Water exchanger
- Specific heat unit
- Specific heat of sugar solution
- Specific heat capacity of ice cream
- Specific heat equation units
- Dulong petit law
- Specific heat of platinum