Lesson 1-4 Flashcards
(49 cards)
At room temperature, F2 and Cl2 are gases, Br2 is a liquid, and I2 is a solid. This is because
Dispersion interactions increase with molecular size.
Which one of the following molecules would be most polar?
HF
Which of the following forces that hold the atoms together in a molecule?
Intramolecular Forces
Which of the following IMFs occur between hydrogen and nitrogen?
Hydrogen Bond
are the attractive forces that act between molecules or particles.
Intermolecular Forces
Who is the proponent of the London Dispersion Force?
Fritz London
The kind of attraction that explains the dissolving of sodium chloride in water is
Ion-dipole
The forces of attraction that exist between nonpolar molecules are called
London dispersion force
is a theory that helps to explain observable properties and behaviors of solids, liquids,
and gases.
Kinetic Molecular Theory
1.
A type of intermolecular attraction—attractions between two polar molecules is called
Dipole-dipole force
The boiling point of water is about 200°C higher than one would predict from the boiling points of
hydrogen sulfide and hydrogen selenide. One may explain this apparent anomaly by which of the
following?
The intermolecular attractive forces are much greater in water than in hydrogen sulfide and
hydrogen selenide.
Why is the normal boiling point of hydrogen fluoride so much higher than that of hydrogen chloride,
the hydride of the next element in group VIIA?
The HF molecules undergo a higher degree of hydrogen bonding than HCl.
A friend in your chemistry class is struggling to understand why crystalline solids are grouped into
four main types: network, molecular, ionic, and metallic. Which explanation below will BEST help
him/her begin to understand why chemists might have these groups?
Crystalline solids all share a lattice structure, but the bonds that hold them together at the
atomic level differ. The elements that make up the solids also differ. These differences affect how a
solid conducts heat and electricity, and its density.
An engineer is designing an electrical system and is looking for a material to transmit energy. She
has four solids available, each made with different materials. To conduct energy most efficiently and
effectively, what material she should use?
Materials whose electrons are held with metallic bonds.
Which of the following is not a property of gases?
Gases are weightless near the surface of the earth
Which of the following has dispersion forces as its only intermolecular force?
CH4
The characteristics of gases needed to describe a gas completely include all the following
Pressure, Temperature, Volume
An engineer is designing an electrical system and is looking for a material to transmit energy. She
has four solids available, each made with different materials. To conduct energy most efficiently and
effectively, what material she should use?
Materials whose electrons are held with metallic bonds
A statement that is true about solids
All solids maintain a defined shape and size if conditions remain constant.
If the amount and temperature of a gas are kept constant, what do you think will happen to the
pressure and volume of the gas?
The pressure and volume of gas will be inversely proportional.
The concept of “like dissolves like” is illustrated by
Polar solute will be soluble in a polar solvent
A phase transitions should release the most energy is
Gas to solid
What happens to particles when they are heated?
They speed up and spread-out
particles travel in a straight line unless they collide with other particles or the walls of the
container
Gas
