Page 292 - Teacher Preview Copy
P. 292
.
Topic 9 – Kinetics and Equilibrium
16. Physical equilibrium: Recalling concept facts and definitions
1. Given the equilibrium phase change equation below
H2O(s) < -------------- > H2O(l)
What is the temperature of the equilibrium mixture?
o
o
o
o
1) 0 C 2) 373 C 3) 273 C 4) 100 C
2. Given the phase change equation
H2O(g) <======== > H2O(l)
At 1 atm, at what temperature would equilibrium be reached?
1) 273 K 2) 0 K 3) 373 K 4) 298 K
3. Solution equilibrium always exists in a solution that is
1) Unsaturated 2) Saturated 3) Concentrated 4) Dilute
4. A sample of water in a sealed flask at 298 K is in equilibrium with its vapor. This is an example of
Teacher Preview Copy
1) Chemical equilibrium 3) Solution equilibrium
Teacher Preview Copy
2) Phase equilibrium 4) Energy equilibrium
5. Which equilibrium at 1 atm pressure is correctly associated with the Kelvin temperature at which it
occurs?
1) Steam-water equilibrium at 273 K 3) Steam-water equilibrium at 373 K
2) Ice-water equilibrium at 0 K 4) Ice-water equilibrium at 373 K
6. Which of the followings is NOT an example of a physical equilibrium?
1) The equilibrium process for the synthesis and the decomposition of ammonia
2) The equilibrium process dissolving and crystallization of salt in a saturated solution
3) The equilibrium process for the evaporation and condensation of water at 373 K and 1 atm
4) The equilibrium process for the freezing and melting of water at 273 K and 1 atm
7. A liquid in a stoppered flask will be at equilibrium with its vapor when
1) Only evaporation is occurring
2) Only condensation is occurring
3) The rate of evaporation is greater than the rate of condensation
4) The rate of evaporation is equal to the rate of condensation
8. Which description applies to a system in a sealed flask that is half full of water?
1) Only evaporation occurs, but it eventually stops
2) Only condensation occurs, but it eventually stops
3) Neither evaporation nor condensation occurs
4) Both evaporation and condensation occur
9. A solution equilibrium is reached in a saturated solution when
1) Dissolving stops occurring
2) Crystallization stops occurring
3) Both dissolving and crystallization stop occurring
4) Dissolving occurs at the same rate as crystallization is occurring
10. Given the reaction
-
+
NaCl(s) ========= Na (aq) + Cl (aq)
Equilibrium is reached in the reaction when
1) The rates of the forward and reverse reactions are constant
2) The concentration of the reactants and the products are constant
3) The energy of the reactants and the products are equal
4) The entropy of the forward and the reverse reaction are equal
11. In the reaction
3-
2+
Pb(NO3)2 (s) ======== Pb (aq) + NO (aq)
Equilibrium is reached when
1) The rate of dissolving of salt and the rate of crystallization of ions is constant
-
2+
2) The concentration of Pb(NO3)2 (aq) , Pb (aq), and NO3 (aq) are constant
3) The rate of dissolving of salt is slower than the rate of crystallization of ions
2+
4) The concentration of Pb is the same as the concentration of Pb(NO3)2(s)
282 Copyright © 2010 E3 Scholastic Publishing. All Rights Reserved. Survivingchem.com
Topic 9 – Kinetics and Equilibrium
16. Physical equilibrium: Recalling concept facts and definitions
1. Given the equilibrium phase change equation below
H2O(s) < -------------- > H2O(l)
What is the temperature of the equilibrium mixture?
o
o
o
o
1) 0 C 2) 373 C 3) 273 C 4) 100 C
2. Given the phase change equation
H2O(g) <======== > H2O(l)
At 1 atm, at what temperature would equilibrium be reached?
1) 273 K 2) 0 K 3) 373 K 4) 298 K
3. Solution equilibrium always exists in a solution that is
1) Unsaturated 2) Saturated 3) Concentrated 4) Dilute
4. A sample of water in a sealed flask at 298 K is in equilibrium with its vapor. This is an example of
Teacher Preview Copy
1) Chemical equilibrium 3) Solution equilibrium
Teacher Preview Copy
2) Phase equilibrium 4) Energy equilibrium
5. Which equilibrium at 1 atm pressure is correctly associated with the Kelvin temperature at which it
occurs?
1) Steam-water equilibrium at 273 K 3) Steam-water equilibrium at 373 K
2) Ice-water equilibrium at 0 K 4) Ice-water equilibrium at 373 K
6. Which of the followings is NOT an example of a physical equilibrium?
1) The equilibrium process for the synthesis and the decomposition of ammonia
2) The equilibrium process dissolving and crystallization of salt in a saturated solution
3) The equilibrium process for the evaporation and condensation of water at 373 K and 1 atm
4) The equilibrium process for the freezing and melting of water at 273 K and 1 atm
7. A liquid in a stoppered flask will be at equilibrium with its vapor when
1) Only evaporation is occurring
2) Only condensation is occurring
3) The rate of evaporation is greater than the rate of condensation
4) The rate of evaporation is equal to the rate of condensation
8. Which description applies to a system in a sealed flask that is half full of water?
1) Only evaporation occurs, but it eventually stops
2) Only condensation occurs, but it eventually stops
3) Neither evaporation nor condensation occurs
4) Both evaporation and condensation occur
9. A solution equilibrium is reached in a saturated solution when
1) Dissolving stops occurring
2) Crystallization stops occurring
3) Both dissolving and crystallization stop occurring
4) Dissolving occurs at the same rate as crystallization is occurring
10. Given the reaction
-
+
NaCl(s) ========= Na (aq) + Cl (aq)
Equilibrium is reached in the reaction when
1) The rates of the forward and reverse reactions are constant
2) The concentration of the reactants and the products are constant
3) The energy of the reactants and the products are equal
4) The entropy of the forward and the reverse reaction are equal
11. In the reaction
3-
2+
Pb(NO3)2 (s) ======== Pb (aq) + NO (aq)
Equilibrium is reached when
1) The rate of dissolving of salt and the rate of crystallization of ions is constant
-
2+
2) The concentration of Pb(NO3)2 (aq) , Pb (aq), and NO3 (aq) are constant
3) The rate of dissolving of salt is slower than the rate of crystallization of ions
2+
4) The concentration of Pb is the same as the concentration of Pb(NO3)2(s)
282 Copyright © 2010 E3 Scholastic Publishing. All Rights Reserved. Survivingchem.com
