Inter and Intramolecular Forces
States of Matter/Phase Changes
Gases General
Calculate
Misc.
100
The stronger of the 2 forces
Intramolecular forces
100
The process of converting liquid to solid
freezing
100
What is force per unit area
Pressure
100
A tank of CO2 has a pressure of 57.8 atm and a volume of 150.0 mL at 25 C. What would the volume be when the pressure is decreased to 24.5 atm?
354 mL
100
If the temperature of a gas is increased and the volume is held constant, then the pressure will ___________.
Increase
200
Which intermolecular force is the strongest
Hydrogen bonding
200
What phase would exist at 1.6 atm of pressure and a temperature of 120 C?
Liquid
200
Gasses have (definite/indefinite) shape and (definite/indefinite) volume. In general their density is _____ compared to solids and liquids.
indefinite, indefinite, very low/small
200
A rigid plastic container holds 1.00 L methane gas at 0.900 atm pressure when the temperature is 22.0°C. What pressure will the gas exert if the temperature is raised to 44.6°C?
.969 atm
200
Endothermic or exothermic: Freezing
Exothermic
300
Which would have the highest boiling point?
MgBr2, H2O, NH3, C2H4
MgBr2
300
Exothermic or Endothermic: Sublimation
Endothermic
300
Identify the gas law needed to solve: When filling a weather balloon with gas you have to consider that the gas will expand greatly as it rises and the pressure decreases. Let’s say you put about 10.0 moles of He gas into a balloon that can inflate to hold 5000.0L. Currently, the balloon is not full because of the high pressure on the ground. What is the pressure when the balloon rises to a point where the temperature is -10.0°C and the balloon has completely filled with the gas?
Ideal Gas Law
300
What volume of O2 is produced when 28.5 g of hydrogen peroxide decomposes to form water and oxygen at 150 C and 2.0 atm?
7.3 L O2
300
What process is occurring as you move directly from point A to E?
Sublimation
400
The intermolecular force that exists between molecules of water vapor under normal/standard conditions
None, we are considering it as an ideal gas
400
The point where all 3 phases can exist at once
Triple point
400
Two balloons, one filled with water vapor and the other carbon dioxide, are punctured; which gas would effuse the fastest assuming the pressure and temperature of the gases are equal?
Water vapor
400
Calculate the pressure (atm) in a 2.12 x 105 mL tank containing 23.3 kg of argon gas at 25°C?
67.3 atm
400
Under which set of conditions would a gas behave most non-ideally?
A. 30K and 2.3 atm
B. 300K and 2.3 atm
C. 30K and 50 atm
D. 300K and 50 atm
C. 30K and 50 atm
500
The types of forces (Intramolecular and Intermolecular) involved in one mole of liquid methane.
Non-polar covalent; London Dispersion Forces
500
What is happening with energy in a heating curve when temperature is NOT increasing (what is it being used for)
Intermolecular forces are being broken
500
Two identical one liter balloons are filled with helium and decane (C10H22) respectively, where each is at 25C and 1 atm. Which would contain the greatest number of particles?
They would be equal.
500
A gaseous compound is 78.12% boron and 21.86% hydrogen. At 27.0 C, 74.3 mL of the gas exerted a pressure of 1.12 atm. If the mass of the gas is 0.0934 g, what is the molecular formula?
B2H6
500
What is the freezing point of ethanol?
-115 C