Let's Get Gassy
Joule-ery ⯁⯁
Mist-erous Changes
Never Gonna Gibb You Up
Chemical st-rate-gies
100
For an ideal gas at constant volume, as temperature increases, pressure ________________ .
What is increases?
100
If ΔH of a reaction is less than zero than reaction will be exothermic, endothermic, or unknown?
What is exothermic?
100
The process of going from a solid to a gas is known as this.
What is sublimation?
100
Overall, ΔSuniverse is always ______________ .
What is increasing?
100
The following reaction is elementary as written:
NH2 + H --> NH3
What is the rate law?
What is rate = k[NH2][H]
200
This happens to the peak HEIGHT for the following distribution of gas particles when the temperature is increased.
What is decreases!
(Peak height decreases, curve moves to right)
200
The ΔH of vaporization is the following value.
What is 43135 J/mol (or 43.1 kJ.mol)
200
The normal boiling point of a substance is its boiling point at this pressure.
What is 1 atm?
200
If in a certain reaction, ΔH is negative and ΔS is positive, will this reaction be spontaneous, non-spontaneous, or unknown?
What is spontaneous?
200
The Arrhenius equation, can be used to calculate this energetic quantity.
What is the activation energy of a reaction?
300
The partial pressure of helium if it exists in a mixture of 32 g of oxygen and 36 g of helium has a total pressure of 2.0 atm.
What is 1.8 atm.
1) Calculate mols of Helium and Oxygen (9 and 1 respectively)
2) Calculate mol fraction of Helium (9/10 = 0.9)
3) Multiply by total pressure (0.9*2)
300
In an isochoric process the increase in internal energy (ΔE) is equal to this.
What is the heat absorbed (or positive q)?
300
Assign the appropriate labels for the below phase diagram
A -> gas
B -> solid
C -> Liquid
D -> Triple point
300
Arrange the following in order of decreasing molar entropy at 298 K.
HCl CH4 Ar
What is CH4 > HCl > Ar?
(more molecular complexity = higher entropy)
300
The rate of a chemical reaction is as follows:
rate = k([A][B]2)/([C]1/2[D]1/2)
What happens to the reaction rate if the concentrations of A, C, and D are all doubled?
What is stay the same?
400
The units of the gas constant R, if its value is 8.314.
What is J/mol.K
(also accepted:
m3⋅Pa/mol.K and its variations)
400
In a bomb calorimeter, this reactant is provided in excess.
What is Oxygen gas?
400
What is ΔH of the below transformation?
C (s, graphite) ---> C (s, diamond) ΔH° = ??? kJ
----------------------------------------------------------
C (s, graphite) + O2(g) ---> CO2(g)
ΔH° = −393.5 kJ
C (s, diamond) + O2(g) ---> CO2(g)
ΔH° = −395.4 kJ
What is +1.9 kJ?
400
10 particles exist in container 1. Over time, these particles distribute into container 2 where 5 particles exist in each container. What is the total number of microstates (W) present?
What is 252?
(N!/(n1!n2!)) = (10!/(5!5!))
400
The following plot shows a reaction that is _____________ order in A.
What is second order?
500
The rate of effusion of an unknown diatomic gas is 5 mL/min. Under identical conditions the rate of effusion of hydrogen gas is 20 mL/min.
What is the unknown gas?
What is O2?
(Graham's Law of Effusion: 20/5 = sqrt(MM unknown/ MM H2)
MM H2 =2 so MM unknown =32
Which is O2.
500
Under what condition(s) is ΔE = ΔH ?
What is at conditions of constant pressure?
500
Write an equation (no numbers needed) that represents the total amount of heat absorbed for solid acetone goes to liquid acetone from -120C to -60C.
What is q = mcacetone(s) ΔT + n ΔHfus + mcacetone(l)ΔT?
Can get more specific with ΔT (first one is +25, second is +35)
500
What is Boltzman's constant? (numerical value)
What is 1.38 x 10-23 J/K
500
What is the orientation factor if the frequency of collisions is 1011 given the Arrhenius plot below?
What is 0.438?