Daniell Cells - Effect of conditions

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SUMMARY

The discussion focuses on the factors affecting the voltage of a Daniell Cell, specifically the impact of temperature and concentration of solutions. An increase in temperature initially raises the voltage due to enhanced reaction kinetics, while higher concentrations of Cu2+ and lower concentrations of Zn2+ at their respective electrodes lead to increased voltage by shifting the reaction equilibrium. The relationship between temperature and voltage is explained through the concept of reaction equilibrium, where increased temperature can push the system further from equilibrium, thus affecting voltage output.

PREREQUISITES
  • Understanding of electrochemical cells, specifically Daniell Cells
  • Knowledge of reaction equilibrium principles in chemistry
  • Familiarity with the Nernst equation and its application to voltage calculations
  • Basic concepts of thermodynamics related to temperature and reaction rates
NEXT STEPS
  • Study the Nernst equation and its implications for Daniell Cell voltage
  • Research the effects of temperature on reaction kinetics and equilibrium
  • Explore the principles of electrochemistry related to concentration effects
  • Investigate analogies for visualizing electrochemical reactions and equilibrium shifts
USEFUL FOR

Chemistry students, educators, and researchers interested in electrochemistry, particularly those studying the behavior of Daniell Cells under varying conditions.

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Homework Statement



I am doing a chemistry extended experimental investigation on the variables affecting a Daniell Cell's voltage. I am required to understand the reasoning behind voltage increase and decrease for particular conditions. I have done extensive research, but am unable to find a decent explanation that does not go into too much physics and complexity. Please keep in mind that this is a CHEMISTRY investigation.

I would like to know why temperature increase in solutions causes a slight voltage increase (at least initially), also why the concentrations of the solutions would affect voltage. For example, increasing Cu2+ at the site of reduction and reducing Zn2+ at the site of oxidation would (I believe) increase voltage.

Please if possible, give me some sort of an analogy or way of visualizing what exactly is going on. I appreciate this very much!
 
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The further system is from equilbrium, the stronger are forces that push it into equilibrium position.
 
Thanks! That helps with the concentration part of things, but how about temperature? Is temperature a product of the reaction? How would increasing the temperature of both solutions cause the reaction to shift further from equilibrium?
 
Last edited:
Temperature is not a product of the reaction, heat can be.
 

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