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What are the properties of gases?
pressure, volume, and amount of gas present
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Pressure exerted by a gas depends on what three entities?
volume, temperature, and the number of molecules present
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What is pressure?
is defined as the force per unit area on a surface
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What is the unit for measuring for measuring force?
N-newton: It is the force that will increase the speed of a one-kilogram mass by one meter per secind each second that the force is applied
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What constitutes atmospheric pressure?
Atmospheric pressure is the sum of the individual pressures of various gases in the atmosphere
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What is the purpose for a barometer?
to measure atmospheric pressure
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What measures an enclosed gas sample?
mercury barometer
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What are the units for measuring pressure and their equivalence?
- Pa- pascal
- milimeter of mercury - mmttg
- atmosphere - af-m
- pounds per square in. -psi
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What are the conditions for standard temperature and pressure (STP)?
For purposes of comparison, scientists have agreed on standard conditions of exactly 1 atm pressure and 0 degrees celsius.
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What does Dalton's law of partial pressure state? What is the formula?
- The total pressure if a gas mixture is the sum of the partial pressures of the component gases
- Formula: PT= P1+P2+P3
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What is the formula for atmospheric pressure?
Patm = Pgas+PH2O
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What does the term gas law mean?
mathematical relationships between the volume, temperature, pressure and amount of gas
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What does Charles's law state? What is the fomula?
The volume of a fixed gas at constant pressure varies directly with the Kelvin temperature
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What is absolute zero? What is the value of it?
-275 degrees Celsius is absolute zero and is given the value zero on the Kelvin state
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How do you find degrees Kelvin?
V = KT
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What does Gay-Lussac's Law state? What is the formula?
- The pressure of a fixed mass of gas at constant value varies directly with the Kelvin temperature
- Formula: P = KT
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What does the combined gas law state? What is its formula?
expresses the relationship between pressure, volume, and temperature of a fixed amount of gas (PV)/T = K
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