Practice Cell Emf And Gibbs Free Energy (3.5)

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6 sample questions

Question 1.
What is the formula to calculate EMF?
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Think about the differences in electrode potentials.
Question 2.
What does a negative ΔG indicate?
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Recall what spontaneous means in thermodynamics.
3Question 3.
What does the equation ΔG = -nFE represent?
- Change in Gibbs free energy
- Change in temperature
- Change in pressure
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Think about energy transformations.
4Question 4.
True or False: A positive EMF indicates a spontaneous reaction.
- True
- False
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Recall our discussions about spontaneity.
Question 5.
In an electrochemical cell, the cathode potential is 1.23 V, and the anode potential is 0.34 V. Calculate the EMF and assess the spontaneity of the reaction.
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Recall the formula for calculating EMF.
Question 6.
If 4 moles of electrons are transferred in a redox reaction with an EMF of 0.75 V, calculate the Gibbs free energy change.
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Use the provided values in the Gibbs energy equation.

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