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Equilibrium – Physical Equilibrium
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- 4. Periodic Table 0%
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- 9. Kinetics and Equilibrium 0%
Question 1 of 10
1. QuestionCategory: 9. Kinetics and Equilibrium
Which changes can reach equilibrium?Correct
Question 2 of 10
2. QuestionCategory: 9. Kinetics and Equilibrium
Equilibrium process can be observed inCorrect
Question 3 of 10
3. QuestionCategory: 9. Kinetics and Equilibrium
At equilibrium, the concentration of the products and of the reactants areCorrect
Question 4 of 10
4. QuestionCategory: 9. Kinetics and Equilibrium
At equilibrium, the rates at which the forward and the reverse processes are occurring areCorrect
Question 5 of 10
5. QuestionCategory: 9. Kinetics and Equilibrium
A chemical reaction has reached equilibrium whenCorrect
Question 6 of 10
6. QuestionCategory: 9. Kinetics and Equilibrium
Which factor must be equal when a reversible chemical process reaches equilibrium?Correct
Question 7 of 10
7. QuestionCategory: 9. Kinetics and Equilibrium
A system is said to be in a state of dynamic equilibrium when theCorrect
Question 8 of 10
8. QuestionCategory: 9. Kinetics and Equilibrium
A liquid in a stoppered flask will be at equilibrium with its vapor whenCorrect
Question 9 of 10
9. QuestionCategory: 9. Kinetics and Equilibrium
A solution equilibrium is reacted in a saturated solution whenCorrect
Question 10 of 10
10. QuestionCategory: 9. Kinetics and Equilibrium
A solution equilibrium always exist in a solution that isCorrect
Equilibrium is when the forward and reverse reaction occur at the same rate.
The rates are equal but the quantities (amounts) of reactants and products are not necessarily equal.
- Equilibrium can only occur:
- In a system in which changes that are taking place are reversible.
- In a closed system. A closed system in which nothing is allowed in or out.
- When equilibrium is reached in a system
- Rate of the forward process is equal to the rate of the reverse process.
- Concentration (amount) of substances remains constant.
- Types of equilibrium.
1. Physical Equilibrium
A. Phase Equilibrium
B. Solution Equilibrium
2. Chemical Equilibrium
PHYSICAL EQUILIBRIUM– occurs in certain reversible physical changes.
A. Phase Equilibrium occurs in a closed system in which phase changes are occurring, at a specific temperature.
e.g 1. Ice/Water equilibrium occurs at 0°C or 273 K (melting and freezing point of water)
H2O(s) ↔ H2O (l)
e.g 2. Water/Steam (vapor) equilibrium at 100°C or 373 K (boiling point of water)
H2O(l) ↔ H2O (g)
B. Solution equilibrium occurs in a closed system in which a substance is dissolving in a liquid.
e.g. 3. Solid in Liquid Equilibrium: In a SATURATED SOLUTION.
NaCl(s) ↔Na+ (aq) + Cl– (aq)
- Equilibrium exists between dissolved particles and undissolved particles.
- Rate of dissolving of the solid is equal to the rate of crystallization of the particles.
- Amounts of solid and ions remain constant in the solution.
e.g. 4. Gas in Liquid equilibrium: In a gaseous solution
- Equilibrium exists between dissolved gases in the liquid and undissolved gas above the liquid.
- Rate of dissolving of the gas is equal to the rate of the gas being undissolved.
- Amounts of the undissolved gas (above the liquid) and dissolved gas (in liquid) remain constant.
CO2 (g) ↔ CO2 (aq)