WorksheetsLM 41 - 42
Total questions: 15
Worksheet time: 8mins
For the reaction
2 HCl + Na2CO3 → 2 NaCl + H2O + CO2
179.2 liters of CO2 is collected at STP. How many moles of NaCl are also formed?
32.0 moles
16.0 moles
12.5 moles
8.0 moles
Real gases and vapors have intermolecular interactions. Recall that the van der Walls equation is expressed in terms of two parameters a and b. Which of H2CO or CH4 has the larger van der Walls parameter a?
They are the same.
CH4
H2CO
Neither
Real gases behave most nearly like ideal gases at
High temperatures and high pressures
Low temperatures and low pressures
High temperatures and low pressures
Low temperatures and high pressures
What does the coefficient “a” stand for in the Van de Waals equation?
The amount of attraction between particles of a gas.
Molar mass
Density
Molar volume
As the volume of an individual gas molecule increases
It behaves more like an ideal gas.
It behaves less like an ideal gas.
The pressure on the gas as a whole decreases.
The pressure on the gas as a whole increases.
As the “a” value increases…
The attraction between particles increase and pressure increases.
The attraction between particles increase and pressure decreases.
The attraction between particles decreases and pressure increases.
The attraction between particles decreases and pressure decreases.
Which is most ideal?
He
CH4
CO2
SF6
Which is least ideal?
He
CH4
CO2
SF6
C3H6O(l) + 4 O2(g) → 3 CO2(g) + 3 H2O(g)
For the above reaction…
The final volume will be greater than the initial volume by a factor of 1.5.
The final volume will be the same as the initial volume due to conservation.
The final volume will be less that the initial volume.
There is no way to know because one of the reactants is a liquid.
The following…
HF < NH3 < HCl < N2 <H2
Ranks gases from most ideal to least ideal based on “a”
Ranks gases from most ideal to least ideal based on “b”
Ranks gases from least ideal to most ideal based on “a”
Ranks gases from least ideal to most ideal based on “b”
What is the ration of products to reactants according to Guy Lussac’s Law of combining volumes for N2 (g) + 3 H2 (g) —> 2 NH3 (g)
1
1/2
2/3
3/2
According to Guy Lussac’s Law of combining volumes for CH4 (g) + 2 O2 (g) —> CO2 (g) + 2 H2O(g)
There will be no volume change.
The volume of the products will be greater.
The volume of the reactants will be greater.
Guy Lussac's doesn't have a law about volumes!
What is the limiting reactant if you have 1 Liter of methane and one Liter of oxygen gas to start with? CH4 (g) + 2 O2 (g) —> CO2 (g) + 2 H2O(g)
Methane
Oxygen
It depends upon Density.
It depends upon the pressure.
The bigger the gas molecules are, the more like an ideal gas they behave.
TRUE
FALSE
I have no idea!
Raising the pressure and lowering the temperature will make a gas
behave more ideally.
behave less ideally.
remain unchanged because they cancel each other out.
It depends upon the gas
