Ch 7 Gas Laws- pt 1
directely proportional vs inversely proportional
Boyle's law : V vs P
Charles' law: V vs T
Avogadros law: V vs n
1. IP
2. DP
3. DP
What is the temperature of a gas if it begins at 2 atm and a temperature of 200 K, then has the pressure change to 20 atm?
2000K
s=1
p=3
d=5
f=7
wavelength vs frequency
Energy vs frequency
DIrectly proportional or Inversely proportional
Wavelength is inversely proportional to frequency
as your wavelength increases your frequency decreases
Energy is directly proportional to frequency
Free points !!
Make sure to start studying for your finals to avoid cramming last minute
6. What pressure (in atm) is exerted by 4.20 moles of gas in a 9.50L container at −12°C?
9.47 atm
What is the volume of a gas if it begins at 20 L and 20 C then has the temperature change to 100 C?
25.46L
Select the pair that has the same electron configuration.
Na- and S2-
Ca2+ and Cl-
C-2 and O2+
Si3+ and Ar
Ca2+ and Cl-
How many orbitals are present in the n = 4 shell of an atom?
16
(# orbitals= n2)
That are the periodic trends for
EA, IE, and Atomic radius
EA and IE: increases going up and to the right
Atomic Radius: increases going down and to the left
Kinetic theory of Gases ( 100 points for every one you get correct)
1. A gas is composed of particles that are separated by relatively large distances. The volume occupied by individual molecules is negligible.
2. Gas molecules are constantly in random motion, moving in straight paths, colliding with the walls of their container and with one another in perfectly elastic collisions.
3. Gas molecules do NOT exert attractive or repulsive forces on one another.
4. The average kinetic energy of the gas molecules is directly proportional to the absolute temperature of the gas.
**The pressure exerted by the gas is due to the gas particles colliding with the container walls.**
A gas occupies 14.0 L at 905 torr and 42°C. What volume will it occupy at 650 torr and −15°C?
15.97 L
what is the electron configuration of Br
1s2, 2s2, 2p6, 3s2, 3p6, 4s2, 3d10, 4p5
just keep in mind that
𝑅=0.08206 ( L·atm)/(mol·K)
so whenever you are using the ideal gas law (pv=nRT) your pressure has to be in atm
What is the Effective nuclear charge experienced by a Phosphorus valence electron
Effective nuclear charge = 5.1
A rigid 18.0L container holds gas at 125°C and 2.75 atm. Calculate the number of moles of gas present.
1.52 mols
What volume is occupied by 0.445 mol of CO2 at 297.0 K and 873 mmHg?
9.44L
What is the electron configuration for As2-
And how would you write the condensed form (ie using the noble gas)
1s22s22p63s23p64s23d104p5
[Ar]4s23d104p5
what happens to the atomic radius to Cations and Anions
Cations- the Radius decreases
Anions- the radius increases
Explain the following:
Effective nuclear charge
Isoelectronic series
Ionization energy
Electon affinity
The net positive charge from the nucleus that an electron experiences
A series of two or more species that have identical electron configurations, but different nuclear charges.
•The ionization energy, IE, of an element is the energy required to remove an electron from a gaseous atom to produce a gaseous cation.
•The electron affinity, EA, of an element is the energy change when an electron is added to a gaseous atom to form a gaseous anion.
A gas sample initially at 6.00 L, 1.35 atm, and 25°C undergoes two changes: first, the temperature is lowered to −10°C at constant pressure, then the pressure is increased to 3.20 atm. What is the final volume?
2.23 L
How many grams of carbon monoxide can be produced from a 6 liter tank of oxygen and excess carbon at 200 K and 4 atm?
2C+ O2 --> 2CO
81.9 g CO
Select the set of quantum numbers that is not permitted.
n = 3, l = 4, ml = 2, ms = +½
Free bonus !!
there may or may not be a bonus about Hess's law
Identify the isoelectronic series in the following group of species, and arrange the ions in order of increasing radius: K+, Ne, Ar, Kr, P 3-, S 2-, and Cl-1.
K+<Cl-<S2-<P3-
(this was from the ppt, ig Ar was not included since its neutral?)
The species with the smallest Z will have the largest radius.
The species with the largest Z will have the smallest radius.