Midterm 1 CHEM 1B: Thermochemistry and Intermolecular Forces
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40 Terms
What are the physical characterisitcs of gases?
How many inches of mercury are there in 1 atm
29.92
What is an anticyclone?
A Higher pressure area where surface pressure is greater than the surroundings
What is a Cyclone
A low pressure area where surface pressure is lower than the surroundings
How many Pa is there in 1 bar
10^5
How many Pa are there in 1 atm
1.01325×10^5
What does a manometer do?
Measures the gas pressure from a height of a liquid needed to counter balance the pressure in the container
What is true in a closed tube manometer
Pgas=PHg
What equation would you use to get the Pgas in a open tubed manometer
Pgas=Phg+Patm
What is true for when the pressure of a gas is higher than the atmospheric pressure in a manometer
Pgas<Patm
What is true for when the pressure of the gas is lower than the atmospheric pressure?
Pgas>Patm
What are the properties of Boyles Law
At constant temperature and constant amount of gas
When the volume decreases and the number of collisions increases, what happens?
Pressure increases
Properties of Charles Law
The volume increases linearly with temperature
As temperature increases the gas molecules move faster, What happens
Collisions increase and force per collision with the wall.
Properties Of Avogadros Law
Linear relationship between gas and the volume it occupies, at constant temperature and pressure.
V1/N1 = V2/N2
What is the value of R?
0.08206
What are the density equations
Define all the terms in Daltons Law of Partial Pressures: Pt=P1 +P2
P1 and P2 are partial pressures. Pt is the total pressure of the mixture
Define the properties of the Kinetic Molecular Theory Of Gases
How do you find momentum?
mass x velocity
How do you find force
mass x acceleration
How do you find pressure
force / area
How do you find density
mass / volume
How do you find kinetic energy
1/2mass x velocity ²
How do you find the average kinetic energy of a gas
3/2RT
Mean free path
proportional to pressure
Diffusion
The gradual mixing of molecules of one gas with molecules of another gas by virtue of their kinetic properties
Effusion
The process by which gas from one compartment into another compartment by passing through a small opening with size less than the mean free path of the gas.
Thermochemistry
The relationship between chemisrtry and energy
Energy
Is the capacity to do work/an object can posses energy
Work
Is the result of force acting through a distance Work is a transfer of energy
Potential energy
Energy associated with an objects position or composition
Chemical energy
Energy stored in intramolecular bonds; it is released in chemical reactions.
Nuclear energy
Energy stored in the collection of neutrons and protons in the atoms nucleus
Kinetic Energy
Energy associated with the motion of an object
Thermal Energy
Energy associated with the random (kinetic) motion of atoms and molecules
Radiant Energy
Energy in the form of radiation; a stream of photons from the sun is an example
Electrical Energy
Energy associated with the flow of (electric) charges
What is lattice energy
the energy released when the solid crystal forms seperate ions in the gas state
Note 
Flashcards (36)