The Heating Curve of Water - Jefferson Forest High School
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Transcript The Heating Curve of Water - Jefferson Forest High School
A
phase is a uniform collection of particles.
Some things can exist in two phases
(milkshakes, slushies, etc.)
Dynamic equilibrium is a state of a
compound where the particles move
between 2 different states.
A phase diagram shows the state of a
compound with temperature and pressure.
Vapor
pressure is the pressure produced by a
liquid or a solid when it is in dynamic
equilibrium with its gas phase and is
measured in mmHg or kPa.
As temperature increases, vapor pressure
increases and exerts pressure on the walls of
the container.
pressure (atm) -----
Phase Diagram
Melting pt. - liquid and solid
phases at equilibrium
liquid
solid
Boiling pt. - liquid and
gas phase at
equilibrium
gas
0.6
triple point - point at which solid, liquid
and gas phases are at equilibrium
2.6
Temperature (C)
Heat
of vaporization - the amount of heat
necessary to vaporize a given amount of
liquid.
The
molar heat of vaporization of water is
40.7 KJ/mol. Therefore 40.7 KJ of energy is
required to vaporize one mole of water.
Heat
of fusion - amount of heat necessary to
convert a given amount of a solid into a
liquid.
The
mol
molar heat of fusion for water - 6.00 KJ/
Temperature C -----
Heating Curve for
Water
100
vaporization
heat of vaporization
liquid
melting
heat of fusion
freezing
0
solid
heat added
gas
condensation
Lab
Activity: Graphing the heating curve for
water
Using the labquest with a temperature probe,
graph the temperature versus time of a sample
of H2O from the solid to the gaseous form