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Worksheets3rd Quarter Test Review- Part 1(Chapter 13,14,15)
Total questions: 25
Worksheet time: 13mins
Charles’s Law explains the relationship between the
temperature and volume of a gas. Which graph best
represents this relationship?
Which of these decreases as a given volume of gas
increases?
Number of gas particles
Temperature
Pressure
Kinetic energy
You are given a balloon filled with a known volume
of helium gas. You place the balloon inside a freezer
for an hour. How will the balloon look after being in
the freezer?
Physicians can use liquid nitrogen to freeze and
destroy warts and other skin growths. Knowing the
assumptions of the universal gas law, this should
surprise you most because _________.
if a gas can liquefy, that would imply that gases
experience intermolecular forces
all gases are volatile and can’t be used indoors
gas particles are too small to be condensed
if a gas can freeze, that would imply that gases
can be kept at cold temperatures
David has two containers of two different gases at the
same temperature and pressure. David could assume
all of following EXCEPT _________.
when the temperature is increased, the volume of
both containers will increase
when the pressure is increased, the volume of
both containers will decrease
both containers contain the same number of gas
particles
when the pressure is decreased, the temperature
of both containers will increase
Which of the following is a gas–gas behavior
relationship?
Helium gas is heated and its volume increases
Oxygen gas is compressed and its temperature
increases.
Nitrogen gas is placed in a container and the
molecules settle to the bottom.
Hydrogen gas is cooled and its pressure
increases.
Which question cannot be answered scientifically?
How many particles do two gases at the same
temperature and pressure contain?
What happens to a gas at standard temperature
and pressure?
How does a gas react when heated to 100C?
What happens to a sample of gas at absolute
zero?
A beaker contains a saturated solution of water and
NaCl at 25C. How could the amount of NaCl that
can be dissolved in the solution be increased?
Add more NaCl.
Heat the solution
Add a second salt.
Transfer the solution to a larger beaker.
Which of these decreases as the amount of solute
particles in a solution increases?
Boiling point
Osmotic pressure
Freezing point
Molality
Breaking a large solid into smaller pieces increases its
rate of solvation in a solvent. This process accelerates
the rate because _________.
greater surface area increases the likelihood of
collisions
it makes the solid immiscible
greater surface area decreases the likelihood of
collisions
it creates an adiabatic environment
Suppose 8 mol of solute is dissolved in 2 L of
solution. What is the molarity of the solution?
2M
4M
8M
16 M
The table above shows the effects of various solutes
in a given volume of water. Without knowing the
actual values, which of these is the most likely reason
that the Na2CO3 will cause the greatest boiling point
elevation?
Na2CO3 is the only solute that exhibits the
Tyndall effect.
Na2CO3 produces the smallest number of moles
in solution.
Na2CO3 has the greatest heat of enthalpy.
Na2CO3 produces the largest number of solute
particles in solution.
The table shows that the amount of sodium nitrate
that can be dissolved in water _________.
increases as the temperature increases
increases as the surface area of molecules of
sodium nitrate increases
decreases as molarity increases
decreases as the pressure increases
According to these data, approximately how many
grams of sodium nitrate can be dissolved at 70
degrees Celsius?
115 g
125 g
131 g
137 g
Janet wants to dissolve carbon dioxide in water. The
rate of solvation could be most improved
by _________.
decreasing the temperature and increasing the
pressure
increasing the temperature and decreasing the
pressure
decreasing the temperature and decreasing the
pressure
increasing the temperature and increasing the
pressure
Which of the following is required in order for a
solute to achieve maximum solubility in a solvent?
The crystallization rate must exceed the rate of
solvation.
The colligative properties of the solute must be at
a maximum.
The solvation rate must exceed the rate of
crystallization.
Seed crystals must be added to the solvent.
A student performed the following experiment. He
drew and labeled the graph below based on his
results. Which best describes his results?
The reaction is endothermic
The reaction is exothermic.
The reaction requires no energy
The reaction shows no entropy.
When you eat a slice of pizza, the crust is often
less hot than the toppings or sauce. This most
likely occurs because the toppings and sauce have a
greater _________.
molar enthalpy of formation
specific heat
heat of fusion
mass
The equation shows the change in enthalpy when one
mole of liquid water vaporizes into water vapor. This
is called the molar heat of vaporization. Given this
information, which of these is the proper value for the
molar heat of condensation?
Hcond= - 40,7 kJ
Hcond= 0 kJ
Hcond= - 571.6 kJ
Hcond= - +571.6 kJ
Which of these is required for a reaction to be called
exothermic?
The enthalpy of the reactants must be less than
that of the products.
The sign of the change in enthalpy for the
reaction must be positive.
The enthalpy of the products must be less than
that of the reactants
Heat must flow from the surroundings into the
system.
Fusion, or melting, is an endothermic process because
it _________.
requires heat to be transferred from system to
surroundings and has a H that is negative
requires heat to be transferred from surroundings
to system and has a H that is positive
involves a decrease in entropy
involves a decrease in kinetic energy
How does a catalyst increase the rate of a chemical
reaction?
by increasing the concentrations of the reactants
by increasing the speed of the molecules
by lowering the energy of the products
by lowering the activation energy
Professor Bothwell determined from the wrapper the
number of calories in a candy bar. He then burned the
entire candy bar and measured the amount of heat
released. His experiment was most likely designed to
demonstrate _________.
the law of conservation of matter
the law of disorder
the law of conservation of energy
the law of constant composition
The rate of a reaction can be described by calculating
_________.
evidence of reactant depletion
evidence of product formation
the increase in the concentration of the reactants
with time
the increase in the concentration of the products
with time
The reaction rate of a substance is shown below.
What does this graph illustrate?
As the concentration increases, the reaction rate
decreases.
As the temperature increases, the reaction rate
increases.
As the pressure increases, the reaction rate
decreases.
The reaction rate stays constant
