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Worksheetsch 11 revision
Total questions: 28
Worksheet time: 56mins
Which of the following best describes Boyle’s Law?
The volume of a gas is directly proportional to its temperature, if the pressure is
kept constant.
The volume of a gas varies inversely with pressure, at a constant temperature.
The pressure of a gas is directly proportional to its temperature, if the volume is
kept constant.
At constant volume and temperature, the total pressure of a gas is equal to the
sum of its partial pressures
A gas is confined to a steel tank with a fixed volume. At 293 K, the gas exerts a
pressure of 8.53 atm. After heating the tank, the pressure of the gas increases to
10.4 atm. What is the temperature of the heated gas?
357 K
326 K
240 K
926 K
A model hot air balloon has a volume of 35.0 L at a pressure of 100 kPa and a
temperature of 353k . Calculate the new volume if the temperature is decreased to
288ºC (assume constant pressure
28.6 L
28.9 L
28 L
30 L
A hypothetical gas whose molecules occupy negligible space and have no interactions, and that consequently obeys the gas laws
ideal gas
real gas
The temperature at which the motion of particles theoretically ceases is known as absolute zero
true
false
Today, the air on Earth is mostly nitrogen and oxygen gases, but this
was not always the case
true
false
Why does a gas in a closed container exert pressure?
Because the moving molecules of the gas hit the container walls, therefore it exerts pressure
The column is stopped because the atmosphere exerts a pressure on the surface of the mercury outside the tube.
Why does a column of mercury in a tube that is inverted in a dish of mercury have a height of about 760 mm at sea level?
The column is stopped because the atmosphere exerts a pressure on the surface of the mercury outside the tube.
Because the moving molecules of the gas hit the container walls, therefore it exerts pressure
three units used to express pressure.
Atmospheres (atm)Pascals (P)Pounds Per Square Inch (psi)Torr (torr)Millimeteres Mercury (mmHg)
true
false
pascal is a unit of pressure which is defined as newtons (N) per square meter (m²)
true
false
Convert 1.25 atm to torrs
950Torr
990Torr
Convert 2.48 x 10-³ atm into torrs
1.88torr
1.77torr
How are the volume and pressure of a gas at constant temperature related?
Pressure and volume are inversely related.
Pressure increases because there will be more gas molecules per unit volume. The number of collisions with the given unit of wall area in the container per unit time will increase as a result.
Explain why pressure increases as a gas is compressed into a smaller volume?
Pressure increases because there will be more gas molecules per unit volume. The number of collisions with the given unit of wall area in the container per unit time will increase as a result.
For a fixed quantity of gas at constant volume, the pressure should be directly proportional to the Kelvin temperature, which depends directly on average kinetic energy.
What are gases composed of?
Particles that are moving randomly and very fast in their containers.
Pressure
The pressure of a gas depends on what?
When it collides with a surface or other gaseous particles.
The number of gas particles in a given volume, the volume of the container and the average speed of the gas particles.
Pressure
Force/Area
Force/Volume
Area/Volume
How can atmospheric pressure be measured
By a barometer
By a pressure
SI Unit of Pressure (1 Pa = n/m(squared))
pascals
bar
atm
Investigates pressure and volume relationship
Boyle's Law
Charles's Law
Avogadro's Law
Investigates volume and temperature relationship
Charles's Law
Avogadro's Law
Boyle's Law
At constant n and P, V ______ linearly with T.
increase
decrease
The equations that express the relationship among T, P, V, and n are known as
gas laws
Simple Gas Laws
Boyle's Law
Pressure (P), Volume (V), Temperature (T), and amount in moles (n) are the four basic proprieties of gas
true
false
P is pressure in atm
true
false
V is volume in moles
false
true
T is temperature in Kelvins
true
false
The other gas laws are found in the ideal gas law if ____ variables are kept constant.
two
three
zero
one
