Boyle's & Charles' Law
If 22.5 L of nitrogen at 748 mm Hg are compressed to 725 mm Hg at constant temperature, what is the new volume?
23.2 L
Determine the pressure change when a constant volume of gas at 1.00 atm is heated from 20 degrees Celsius to 30 degrees Celsius.
1.03 atm
If I have 4 moles of a gas at a pressure of 5.6 atm and a volume of 12 L, what is the temperature?
205 K
What are secondary forces? (AKA: intermolecular forces or van der Waals forces)
The attractive forces between molecules are called secondary forces
Identify the strongest secondary force present in pure samples of the following substance: PCl3
Dipole-Dipole Forces
A gas with a volume of 4.0 L at a pressure of 205 kPa is allowed to expand to a volume of 12.0L. What is the pressure in the container if the temperature remains constant?
68.3 kPa
A gas container is initially at 47 mmH and 77 K. What will the pressure be when the container warms up tp room temperature of 25 degrees Celsius?
182 mm Hg
If I have 7.7 moles of gas at a pressure of 0.09 atm and at a temperature of 56 degrees Celsius, what is the volume of the container that the gas is in?
2310 L
What makes a molecule polar?
Identify the strongest secondary force present in pure samples of the following substance: SO3
London Dispersion Forces
What pressure is required to compress 196.0 L of air at 1.00 atm into a cylinder whose volume is 26.0 L?
7.54 atm
A gas thermometer measures temperature by measuring the pressure of a gas inside the fixed volume container. A thermometer reads a pressure of 248 torr at 0 degrees Celsius. What is the temperature when the thermometer reads a pressure of 345 torr?
380 K or 107 degrees Celsius
If I initially have a gas at a pressure of 12 atm, a volume of 23 L, and a temperature of 200 K, and then I raise the pressure to 14 atm and increase the temperature to 300 K, what is the new volume of the gas?
29.57 L
What is a dipole-dipole force? What kinds of molecules make up the dipole-dipole force?
A dipole-dipole force is an attractive force between polar molecules
Determine the kinds of secondary forces that are present in each of the following elements or compound: NCl3
Dispersion and Dipole-Dipole Forces
A sample of hydrogen has an initial temperature of 50.° C. When the temperature is lowered to -5.0° C, the volume of hydrogen becomes 212 cm^3 . What was the initial volume of the hydrogen in dm^3 ?
0.256 dm ^3
If a gas is cooled from 323 K to 273.15 K and volume is kept constant what final pressure would result if the original pressure was 850 mm Hg?
719 mm Hg
A gas takes up a volume of 17 L, has a pressure of 2.3 atm, and a temperature of 299 K. If I raise the temperature to 350 K and lower the pressure to 1.5 atm, what is the new volume of the gas?
30.48 L
What is Hydrogen bonding? What are the three elements that H bonds to when the bond is considered to be a Hydrogen bond?
The difference in electronegativity between hydrogen and each of these elements (F, O, N), and therefore the polarity within such a bond, is very large. This polarity leads to a very strong force, called hydrogen bonding.
Determine the kinds of secondary forces that are present in each of the following elements or compound: H2O
Dispersion, Dipole-Dipole, Hydrogen Bonding
A sample of helium has a volume of 521 dm^3 at a pressure of 75 cm Hg and a temperature of 18° C. When the temperature is increased to 23° C, what is the volume of the helium?
530 dm ^3
The temperature of a sample of gas in a steel tank at 30 kPa is increased from -100 degrees Celsius to 300 degrees Celsius. What is the final pressure inside the tank?
99.4 kPa
If I have 17 L of gas at a temperature of 67 degrees Celsius and a pressure of 88.89 atm, what will be the pressure of the gas if I raise the temperature of 94 degrees Celsius and decrease the volume to 12 L?
135.92 atm
How can you predict the boiling points from high to low based on the secondary forces present?
The stronger the secondary force, the higher the boiling point.
Arrange the following in order of INCREASING boiling point: CH4, CH2CH3, CH2CH3Cl, CH3CH2OH
CH4, CH2CH3, CH2CH3Cl, CH3CH2OH