CHEM 103 EXPERIMENT 5 GAS LAWS ALL SOLUTIONS WITH
EXPLANATIONS + ADDITIONAL NOTES AS PER MARKING
SCHEME 2022/2023
When we measure gas pressure, what is actually being measured? - ANSWER: The
force from particles hitting the walls of the container per unit of area
What are the conversions for standard atmospheric pressure? - ANSWER: 1 atm =
760 mmHg = 760 torr = 101.3 kPA
What is a barometer? - ANSWER: Instrument used to measure air pressure
What is a manometer? - ANSWER: Gases given off during experiments are measured
using a manometer
What happens to atmospheric pressure as altitude increases? Why? - ANSWER:
Atmospheric pressure decreases due to less atmosphere pushing down on the
surface.
What effect does this have on cooking times of foods? - ANSWER: Foods must be
cooked longer because the water in the food isn't as hot as normal. Usually the
adjustments involve decreasing the temperature a little and adding extra liquid.
(Don't add as much leavening agent)
What is Boyle's law? - ANSWER: States that pressure and volume are inversely
proportional at constant temp. Since the product of pressure and volume is a
constant, this equation predicts the new pressure or volume if the other condition is
changed.
What is Charles's law? - ANSWER: States that volume and temperature are directly
proportional at constant pressure. Since the quotient of volume and temperature is
a constant, this equation predicts the new volume or temperature if the other
condition is changed.
What is Gay-Lussac's Law? - ANSWER: States that temperature and pressure are
directly proportional at constant volume. Since the quotient of temperature and
pressure is a constant, this equation predicts the new temperature or pressure if the
other condition is changed.
What is Avogadro's law? - ANSWER: States that at the same temperature and
pressure, equal volumes of different gases contain the same number of molecules
(or atoms if the gas is monatomic)
He discovered that at constant temperature and pressure, the volume of a gas is
directly proportional to the number of moles of gas present.
EXPLANATIONS + ADDITIONAL NOTES AS PER MARKING
SCHEME 2022/2023
When we measure gas pressure, what is actually being measured? - ANSWER: The
force from particles hitting the walls of the container per unit of area
What are the conversions for standard atmospheric pressure? - ANSWER: 1 atm =
760 mmHg = 760 torr = 101.3 kPA
What is a barometer? - ANSWER: Instrument used to measure air pressure
What is a manometer? - ANSWER: Gases given off during experiments are measured
using a manometer
What happens to atmospheric pressure as altitude increases? Why? - ANSWER:
Atmospheric pressure decreases due to less atmosphere pushing down on the
surface.
What effect does this have on cooking times of foods? - ANSWER: Foods must be
cooked longer because the water in the food isn't as hot as normal. Usually the
adjustments involve decreasing the temperature a little and adding extra liquid.
(Don't add as much leavening agent)
What is Boyle's law? - ANSWER: States that pressure and volume are inversely
proportional at constant temp. Since the product of pressure and volume is a
constant, this equation predicts the new pressure or volume if the other condition is
changed.
What is Charles's law? - ANSWER: States that volume and temperature are directly
proportional at constant pressure. Since the quotient of volume and temperature is
a constant, this equation predicts the new volume or temperature if the other
condition is changed.
What is Gay-Lussac's Law? - ANSWER: States that temperature and pressure are
directly proportional at constant volume. Since the quotient of temperature and
pressure is a constant, this equation predicts the new temperature or pressure if the
other condition is changed.
What is Avogadro's law? - ANSWER: States that at the same temperature and
pressure, equal volumes of different gases contain the same number of molecules
(or atoms if the gas is monatomic)
He discovered that at constant temperature and pressure, the volume of a gas is
directly proportional to the number of moles of gas present.
