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Spontaneous reaction

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Questions 12-13:
The spontaneous reaction that occurs when the cell above operates is
2 Ag^+ + Cd(s) -> 2 Ag(s) + Cd^2+

a) voltage increases
b )voltage decreases by remains but remains above zero
c) voltage becomes zero and remains remains at 0.
d) no change in voltage occurs.
e) direction of voltage change cannot be predicted without additional information

Which of the above occurs for each of the following circumstances:

12) The silver electrode is made larger.
Ans A, B, C, D or E?

13) The salt bridge is replaced by platinum wire.
Ans A, B, C, D or E?

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12) D No change. The voltage is related with the ...

Solution Summary

The solution is given in short answers. The spontaneous reaction operations are analyzed.

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Enthalpy, Entropy, Spontaneous Reactions, & Other Thermodynamics

BCl3(g) + NH3(g) <---> Cl3BNH3(s) (<---> represents equilibrium in this case)

The reaction represented above is a reversible reaction.

(a) Predict the sign of the entropy change, ΔS, as the reaction proceeds to the right. Explain your prediction.
(b) If the reaction spontaneously proceeds to the right, predict the sign of the enthalpy change, ΔH. Explain your
prediction.
(c) The direction in which the reaction spontaneously proceeds changes as the temperature is increased above a
specific temperature. Explain.
(d) What is the value of the equilibrium constant at the temperature referred to in (c); that is, the specific
temperature at which the direction of the spontaneous reaction changes? Explain.

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