Section 11 Flashcards
Define pressure
force per unit area; P=F/A
conversions of atm
1am= 760 torr, 760 mmHg, 1.01325x10^5 Pa, 101.325 kPa, 14.7 psi
State Dalton’s Law of Partial Pressure
the pressure of each gas in a mixture: it states that the total pressure of a gas mixture is the sum of the partial pressures of the component gasses (Pt=P1+P2+P3…)
Explain what is meant by collecting gas by water displacement
A gas collected by water displacement is not pure but is always mized with water vapor. That is because water molecules of the liquid surface evaporate and mix with gas molecules.
Explain the problem associated with collecting gas by water displacement
Water vapor adds to the total pressure of the collected gas
What is a manometer?
If atmospheric pressure if stronger, subtract difference.
What is a barometer?
If atmospheric pressure is weaker, add the difference.
State Boyle’s Law
Boyle’s Law states that the volume of a fixed mass of gas varies inversely with the pressure of constant temperature; P1V1=P2V2
State Charle’s Law
Charle’s Law states that the volume of a fixed mass of gas at constant pressure varies directly with the Kelvin temperature; V1/T1=V2/T2
State Gay-Lussac’s Law
The pressure of a fixed mass of gas at constant volume varies directly with the Kelvin temperature; P1/T1=P2/T2
State the Combined Gas Law
The Combined Gas Law expresses the relationship between pressure, volume, and temperature of a fixed amount of gas; P1V1/T1=P2V2/T2
What is negative zero?
-273.15C and 0K
State and explain Gay-Lussac’s Law of Combining Volumes of Gases
The law states that at a constant temperature and pressure, the volumes of gaseous reactants and products can be expressed as ratios of small whole numbers.
State and explain Avogadro’s Law
The law states that equal volumes of gases at the same temperature and pressure contain equal numbers of molecules
What is the Standard Molar Volume of a Gas?
The volume occupied by one mole of a gas at STP. It has been found to be 22.4410L (22.4L)
