Daniell Cells - Effect of conditions

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Discussion Overview

The discussion focuses on the factors affecting the voltage of a Daniell Cell, particularly the influence of temperature and concentration of solutions. Participants explore the relationship between these variables and the cell's performance, emphasizing a chemistry perspective.

Discussion Character

  • Homework-related
  • Exploratory
  • Technical explanation

Main Points Raised

  • One participant seeks to understand why an increase in temperature initially causes a slight increase in voltage, along with the effects of solution concentrations on voltage.
  • Another participant suggests that the further a system is from equilibrium, the stronger the forces pushing it towards equilibrium, which may relate to voltage changes.
  • A follow-up question addresses whether temperature is a product of the reaction and how increasing temperature might shift the reaction away from equilibrium.
  • Another participant clarifies that while temperature is not a product of the reaction, heat can be, indicating a distinction in how temperature affects the system.

Areas of Agreement / Disagreement

Participants express uncertainty regarding the role of temperature in the reaction and its effects on voltage, with no consensus reached on the specific mechanisms involved.

Contextual Notes

The discussion includes assumptions about the relationship between temperature, concentration, and voltage without fully resolving the underlying mechanisms or mathematical relationships.

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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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