Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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![Questions 14 & 15 relate to the diagram in Figure 1 below.
Mge)
Zn)
ZNSO4(ag)
MgSO (2)
1 mol dm-3
1 mol dm-3
Figure 1
14. Which of these statements is true about the cell shown?
A. The reaction at the zinc electrode is Zn(s) = Zn²* (aq) + 2e¯
B. Electrons flow through the wire from the zinc to the magnesium electrode
C. The concentration of magnesium ions will increase in the magnesium half-cell
D. The magnesium half-cell represents the cathode compartment
15. Which of the following would cause the e.m.f of the cell to decrease?
A. Increasing the surface area of the magnesium
B. Decreasing the cross-sectional area of the salt bridge
C. Decreasing the concentration of the MgSO4 solution
D. Decreasing the concentration of the ZnSO4 solution
4
16. The reaction between L and M; L(g) + M(g)
second order with respect to M. It may be inferred form this that
LMg) is zero order with respect to I ord
A. if the concentration of L is doubled, the rate doubles
B. the reaction rate is constant
C. if the concentration of M triples, the rate remains the same
D. the rate equation is Rate = k[M]´
17. The specific heat capacity of iron is 0.449 J g ' K -'. How much heat would be absorbed if
29.0 g of iron is heated from 25 °C to 55 °C?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ffa0565ac-07f8-4284-9894-89f432ce5664%2F2e66f34b-dffd-4323-b0d0-ce9cded71428%2F2o1f6p_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Questions 14 & 15 relate to the diagram in Figure 1 below.
Mge)
Zn)
ZNSO4(ag)
MgSO (2)
1 mol dm-3
1 mol dm-3
Figure 1
14. Which of these statements is true about the cell shown?
A. The reaction at the zinc electrode is Zn(s) = Zn²* (aq) + 2e¯
B. Electrons flow through the wire from the zinc to the magnesium electrode
C. The concentration of magnesium ions will increase in the magnesium half-cell
D. The magnesium half-cell represents the cathode compartment
15. Which of the following would cause the e.m.f of the cell to decrease?
A. Increasing the surface area of the magnesium
B. Decreasing the cross-sectional area of the salt bridge
C. Decreasing the concentration of the MgSO4 solution
D. Decreasing the concentration of the ZnSO4 solution
4
16. The reaction between L and M; L(g) + M(g)
second order with respect to M. It may be inferred form this that
LMg) is zero order with respect to I ord
A. if the concentration of L is doubled, the rate doubles
B. the reaction rate is constant
C. if the concentration of M triples, the rate remains the same
D. the rate equation is Rate = k[M]´
17. The specific heat capacity of iron is 0.449 J g ' K -'. How much heat would be absorbed if
29.0 g of iron is heated from 25 °C to 55 °C?
![16. The reaction between L and M; L(g) + M(g)
second order with respect to M. It may be inferred form this that
LMg) is zero order with respect to L and
A. if the concentration of L is doubled, the rate doubles
B. the reaction rate is constant
C. if the concentration of M triples, the rate remains the same
D. the rate equation is Rate =
k[M]°
17. The specific heat capacity of iron is 0.449 J g - K'. How much heat would be absorbed if
29.0 g of iron is heated from 25 °C to 55 °C?
A. 391 J
B. 1808 J
C. 812 J
D. 12.6 J
18. What is the heat capacity of 200 g of nickel if the specific heat capacity is 0.54 kJ / kg / K?
A. 0.108 kJ / K
B. 0.108 J/ K
C. 0.0265 kJ / K
D. 40.8 g / K
19. Which of the statements is TRUE about the heat capacity of an object?
i.
The heat capacity depends on the mass of the object
The units for heat capacity is J or kJ
The heat capacity depends on the specific heat capacity of the object
ii.
ii.
A. ii & iii
B. i & iii
C. i & ii
D. i, ii & iii
20. Sodium hydroxide pellets are placed in a beaker of water and it is found that the beaker gets
hotter. Which of the following best identifies the system, surroundings and direction af heat
transfer?
Direction of heat
transfer
System
Surroundings
A. Sodium hydroxide pellets
Surrounding → System
System → Surrounding
System → Surrounding
Surrounding → System
Beaker
B. Water
Beaker
C. Sodium hydroxide pellets
Water
D.
Beaker
Water
5](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ffa0565ac-07f8-4284-9894-89f432ce5664%2F2e66f34b-dffd-4323-b0d0-ce9cded71428%2Fvgjczv_processed.jpeg&w=3840&q=75)
Transcribed Image Text:16. The reaction between L and M; L(g) + M(g)
second order with respect to M. It may be inferred form this that
LMg) is zero order with respect to L and
A. if the concentration of L is doubled, the rate doubles
B. the reaction rate is constant
C. if the concentration of M triples, the rate remains the same
D. the rate equation is Rate =
k[M]°
17. The specific heat capacity of iron is 0.449 J g - K'. How much heat would be absorbed if
29.0 g of iron is heated from 25 °C to 55 °C?
A. 391 J
B. 1808 J
C. 812 J
D. 12.6 J
18. What is the heat capacity of 200 g of nickel if the specific heat capacity is 0.54 kJ / kg / K?
A. 0.108 kJ / K
B. 0.108 J/ K
C. 0.0265 kJ / K
D. 40.8 g / K
19. Which of the statements is TRUE about the heat capacity of an object?
i.
The heat capacity depends on the mass of the object
The units for heat capacity is J or kJ
The heat capacity depends on the specific heat capacity of the object
ii.
ii.
A. ii & iii
B. i & iii
C. i & ii
D. i, ii & iii
20. Sodium hydroxide pellets are placed in a beaker of water and it is found that the beaker gets
hotter. Which of the following best identifies the system, surroundings and direction af heat
transfer?
Direction of heat
transfer
System
Surroundings
A. Sodium hydroxide pellets
Surrounding → System
System → Surrounding
System → Surrounding
Surrounding → System
Beaker
B. Water
Beaker
C. Sodium hydroxide pellets
Water
D.
Beaker
Water
5
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