solid to liquid Melting What phase of matter is “B”? A B C Temperature Pressure Liquid.
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Transcript of solid to liquid Melting What phase of matter is “B”? A B C Temperature Pressure Liquid.
Review: LIQUIDS &
PHASE CHANGES
solid to liquid
Melting
What phase of matter is “B”?
A
B
C
Temperature
Pres
sure
Liquid
________is the gas phase of a substance normally solid or liquid at room temperature
Vapor
Freezing occurs by the release of _____
energy
Describe a volatile liquid in terms of its rate of
evaporation.Evaporates quickly
______ is the resistance of a liquid to flow
Viscosity
What phase of matter is “A”?
A
B
C
Temperature
Pres
sure
Solid
What is the normal boiling point of water?
100C
Melting occurs by energy being ______.
absorbed
____________ is the temperature and pressure at which all 3
states of matter are at equilibrium
Triple point
_______shows how states of matter are affected by
changes in temperature/pressure
Phase diagram
solid to gas
Sublimation
The triple point of this substance occurs at:
5.2 atm & 216.6 K
__________ is a dynamic condition in which two opposing physical
or chemical changes occur at equal rates in a given closed system
Equilibrium
________ is the temperature at which equilibrium vapor pressure
equals atmospheric pressure
Boiling point
_______ is the pressure exerted by a vapor in equilibrium with its corresponding liquid at a
given temperature.Equilibrium vapor pressure
____________ is the spontaneous mixing of
two or more substances.Diffusion
When energy is added to a substance, the
particles would move ___________
Faster
When does a liquid boil?
Equilibrium vapor pressure EQUALS atmospheric pressure
When energy is taken away from a substance, the particles would move
__________Slower
What is the most abundant liquid?
Water
_____________ is a force common to all liquids that tends to pull
adjacent parts of a liquid’s surface together.
Surface tension
List 2 examples of surface tension.
MeniscusDroplets can formObjects floatCapillary rise
List a volatile substance
Rubbing alcoholNail polish removerGasolinehairspray
When a system at equilibrium is disturbed by application of a
stress, it attains a new equilibrium position that minimizes the stress.
This is known as ___________
Le Chatelier’s Principle
liquid to solid
Freezing
C(s) + H2O(g) CO(g) + H2(g) If the concentration of H2O was increased, the system would shift to the ________
Right
How does a substance evaporate, if equilibrium vapor pressure is LOW?
WHY?SLOWLY!B/c there are STRONG IM forces and requires MORE kinetic energy to become a vapor
Describe a liquid in terms of particle spacing.
Particles are packed relatively closely together
Describe a liquid in terms of particle motion.
Particles vibrate around MOVING points
gas to liquid
Condensation
Describe the general volume of a liquid and
use KMT to explain.Definite VOLUME- b/c particles are close together
Describe the general shape of a liquid and use
KMT to explain.NO Definite SHAPE- b/c particles vibrate around moving points
Describe a liquid-vapor system at equilibrium.
The number of particles leaving the liquid (vaporization) EQUAL the number of particles re-entering the liquid (condensation)
gas to solid
Deposition
What happens to the boiling point of liquids on top of Mt. Everest? WHY?Boiling point is lowerB/c atmospheric pressure is lower
liquid to gas
Vaporization
What phase of matter is “C”?
A
B
C
Temperature
Pres
sure
Gas
What is the difference between the IM forces
during melting and freezing?
Melting = Less IM forces b/c more particle collisions
Freezing = MORE IM forces b/c particles are moving slower