WorksheetsEquilibrium (Questions from Kognity)
Total questions: 5
Worksheet time: 13mins
At a specific temperature, the equilibrium constants were deduced for the following reactions.
[1] 2A(g) + B2(g) ⇌ 2C2(g) Kc1 = 72.4
[2] D2(g) + 2E(g) ⇌ C2(g) Kc2 = 43.1
Calculate the equilibrium constant at the same temperature and pressure for the following equilibrium reaction. State your answer to three significant figures.
[3] A(g) + ½B2(g) ⇌ D2(g) + 2E(g)
(a)
The following equilibrium reaction has an equilibrium constant Kc1.
A + 2B ⇌ C + 2D
Identify which of the following would represent the equilibrium constant Kc2, for the following equilibrium reaction at the same temperature.
½C + D ⇌ ½A + B
Kc2=Kc11
Kc2=Kc11
Kc2=21Kc1
Kc2=2Kc11
The equilibrium reaction of N2O4 (colourless gas) and NO2 (brown gas) is shown below:
N2O4 (g) (colourless gas) ⇌ 2NO2 (g) (brown)
At room temperature, a sealed glass tube of the equilibrium mixture appears to be a dark brown.
When this sealed tube is placed into an ice bath, the gas within the tube starts to change colour and, when equilibrium is reestablished, it is light yellow.
What information does this change provide about the equilibrium mixture in the ice bath?
Forward reaction is endothermic; Kc decreases when mixture is placed in the ice.
Forward reaction is exothermic; Kc decreases when mixture is placed in the ice.
Forward reaction is endothermic; Kc increases when mixture is placed in the ice.
Forward reaction is exothermic; Kc increases when mixture is placed in the ice.
Consider the data for the following reaction.
2NO2 (g) (brown) ⇌ N2O4(g) (colourless)
ΔH = ?
The sign of ΔH for this reaction is __________
and the trial with the darker shade of brown is trial
___________.
negative; 1
negative, 2
positive, 1
positive, 2
Which of the following explains why a catalyst does not affect the position of equilibrium?
A catalyst increases the rate of the forward and reverse reactions equally
A catalyst has no effect on the rate of the forward or the reverse reactions
A catalyst decreases the rate of the forward and reverse reactions equally
A catalyst provides an alternative reaction pathway with a lower activation energy
