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WorksheetsChemical Equilibrium
Total questions: 11
Worksheet time: 16mins
What is true about irreversible reaction?
It has limiting reactant
It does not go to completion
It always have two reactants
the reaction equation is shown by double arrow
Which one is not characteristic of dynamic equilibrium?
Reversible reaction
Must be in closed system
Amount of products similar to amount of reactants
Rate of forward reaction equals to the rate of reverse reaction
In a reversible reaction,the reactants are kept in a closed jar. What happens when the lid of jar is removed?
Dynamic equilbrium occurs
Reaction reaches equilibrium
Products are converted to reactants
Rate of forward is no longer equals to rate of reverse reaction
In dynamic equilibrium,...............
Change in energy does not occur
No reactants are left at the end of reaction
There is no exchange of matter
Identity of reactants change
The following statements about the reaction is true except:
NH2COONH4(s) ⇌ CO2(g) + 2NH3(g)
Kc = [CO2][NH3]2
Kc = mol3L-9
it achieves homogenous equilibrium
pure solid is not included in Kc expression
CH3COOH(l) + CH3OH(l) ⇌ CH3COOCH3(l) + H2O(l)
What is the unit of its Kc?
no unit
mol3L-9
mol3L-3
molL-1
The equilibrium constant, Kc for the chemical reaction below is 0.014 M at 900°C.
C(s) + CO2(g) ⇌ 2CO(g)
Determine the value of Kp for the above reaction at the same temperature.
1.35 atm
0.014 atm
0.742 atm
1.00 atm
What is the value of Kp for 2CO(g) ⇌ C(s) + CO2(g) at the same temperature if the Kp for the reverse reaction is 1.35 atm?
1.00 atm-1
0.742 atm-1
1.35 atm-1
0.005 atm-1
The equilibrium constant, Kp for the reaction below is 60.6 atm at 100°C.
2NOBr(g) ⇌ 2NO(g) + Br2(g)
1.21 mol of NOBr, 0.86 mol of NO and 1.56 mol of Br2 were found at a particular time and the total pressure was 111.15 atm in a 1.0 L vessel.
Determine the Qp.
25.28 atm
24.13 atm
25.40 atm
27.00 atm
2 mol of ethanoic acid, CH3COOH, is mixed with 2 mol of ethanol, CH3CH2OH in a 1L closed flask and allowed to achieve equilibrium in room temperature. The equilibrium mixture was found to contain 0.80 mol of ethyl ethanoate, CH3COOCH2CH3.
CH3COOH(l) + CH3CH2OH(l) ⇌ CH3COOCH2CH3(l) + H2O(l)
Calculate Kc for the above equilibrium at room temperature.
0.31
0.20
0.10
0.44
In a reaction,
CH3COOH(l) + CH3CH2OH(l) ⇌ CH3COOCH2CH3(l) + H2O(l)
If, sulphuric acid is added to remove water molecules, what effect would this have on the equilibrium position of this system?
reaction shifts to the left
reaction shifts to the right
reaction has completed
reaction achieves equilibrium
