(3Q) Properties of Liquids Flashcards
is the amount of energy required to stretch or increase the surface of a liquid by a unit area. a measure of the force necessary to stretch or break the surface of a liquid, is related to cohesion.
Surface Tension
Strong intermolecular forces mean?
High surface tension or High viscosity
is the intermolecular attraction between like molecules
Cohesion
is an attraction between unlike molecules
Adhesion
is a measure of a fluid’s resistance to flow
Viscosity
The pressure exerted by a vapor in thermodynamic equilibrium with its
condensed phases at a given temperature in a closed system.
Vapor Pressure
Low vapor pressure means?
High IMF
Is the heat absorbed by one mole of that substance as it is converted from a liquid to
gas
Molar Heat of Vaporization Hvap
Density of water is greatest at?
4 C
the region around oxygen has a partial negative charge because
oxygen is more electronegative
The region near the two hydrogen atoms has a
partial positive charge
Each water molecule
can form hydrogen
bonds with up to
four neighbors
The hydrogen bonds
joining water molecules
are weak, about _____ as
strong as covalent bonds.
1/20
IS THE AMOUNT OF HEAT THAT MUST BE ABSORBED OR LOST FOR ONE GRAM OF A SUBSTANCE TO CHANGE ITS TEMPERATURE BY 1OC
Specific Heat
In a water molecule two hydrogen atoms form
single polar covalent bonds with an oxygen atom.
responsible for the
transport of the water column in
plants
Cohesion
clinging of one substance to another, contributes too, as water adheres to the wall of the vessels.
Adhesion
Water has a greater surface tension than most other liquids because
hydrogen bonds
When water reaches 0oC, water becomes ___________ with each
molecule bonded to to the maximum of four partners.
locked into a crystalline lattice
Ice is about ___ less dense than water at 4oC
10%
