CHAPTER 13 Flashcards
Bromine liquid evaporates to a gas:
Br2 (l) → Br2 (g)
Which statement is correct?
An equilibrium will established in an open container, providing there is sufficient liquid bromine.
An equilibrium cannot be established since this is not an equilibrium (the arrow points in one direction).
An equilibrium can be established since this is not an equilibrium (the arrow points in one direction).
An equilibrium will established in a closed container, providing there is sufficient liquid bromine.
An equilibrium will established in a closed container, providing there is sufficient liquid bromine.
Benzene (C6H6) is used as an octane enhancer in petrol. It is manufactured from acetylene (C2H2):
3C2H2 (g) → C6H6 (g)
The Keq value that would make this reaction most commercially useful is:
0.001
10
0.1
1
10
For a reaction to favour products, we would expect the likely Keq to be:
<1
0
> 1
1
> 1
Consider the following data:
2NH3(g) ⇌ N2(g) + 3H2(g)
Keq = 17; [NH3] = 0.20 M, [N2] = 1.00 M, [H2] = 1.00 M
The Qc and the direction that this reaction would progress under these conditions is respectively:
25 and left
- 4 and left
- 4 and right
25 and right
25 and left
Consider the equation:
CaCO3 (s) ↔ CaO (s) + CO2 (g)
Under what conditions will this reaction proceed to completion?
When Keq is very large and the container is closed.
When the container is open or the container is closed and the amount of CaCO3 is so small that CO2 is not significant enough to produce a back reaction.
When Keq is small and the container is closed.
none of these
When the container is open or the container is closed and the amount of CaCO3 is so small that CO2 is not significant enough to produce a back reaction.
