30 Questions
What is the maximum amount of electrical energy that can be obtained in a reversible chemical process?
Welec
What is the primary function of an electrochemical cell?
To convert chemical energy into electrical energy or vice versa
What is the relationship between the free energy change and the electrode potential?
ΔG = -nFE
What occurs at the anode in an electrochemical cell?
Oxidation of molecules, atoms, or ions
What is the unit of the Faraday constant?
C/mol
What is the charge of the cathode in an electrochemical cell?
Positive (+)
What is the energy available to do work in a spontaneous reaction?
-ΔG
What is the relationship between the maximum work available and the maximum amount of electrical energy that can be obtained?
Wmax = Welec
What type of reaction occurs at the cathode in an electrochemical cell?
Reduction reaction
What is the number of electrons involved in the reaction?
n
What is the term for the loss of electrons or an increase in oxidation state by a molecule, atom, or ion?
Oxidation
How many kinds of electrochemical cells are mentioned in the text?
Two
What is the formula for the EMF of a concentration cell?
Ecell = Ecell = 2.303RT log(C2) - log(C1) / nF
What is the reason for the absence of E0 in the Nernst equation of a concentration cell?
E0 gets cancelled out
What is the term for the potential of a single electrode?
Single electrode potential
What is the purpose of a calomel electrode in electrochemistry?
To measure the potential of an electrode
What is the characteristic of a galvanic cell?
The anode is negative and the cathode is positive
What is the purpose of an ion selective electrode?
To measure the concentration of a specific ion
What material is used in the positive electrode of a lithium-ion battery?
Lithium Manganese-oxide
What happens during the charging of a lithium-ion battery?
Lithium ions move from the positive to the negative electrode
What is the purpose of the separator in a lithium-ion battery?
To prevent the flow of lithium ions
What is the composition of the negative electrode in a lithium-ion battery?
Carbon
What is the function of the electrolyte in a lithium-ion battery?
To facilitate the flow of lithium ions
What is the advantage of lithium-ion batteries over pure lithium-based batteries?
They are more rechargeable
What is the rate at which a battery loses power over time called?
Shelf-discharge rate
What is a characteristic of modern batteries?
High energy density
What type of battery is more environmentally friendly than Ni-Cd batteries?
Nickel-metal hydride battery
What is a disadvantage of Ni-MH2 batteries?
They have a high self-discharge rate
What is a common feature of Nickel-metal hydride and Ni-Cd batteries?
Sealed assembly
What is the metal used in the assembly of Al-air batteries?
Aluminum
Test your knowledge of electrochemistry, the branch of science that deals with the conversion of chemical energy into electrical energy and vice versa. This quiz covers the principles and reactions involved in electrochemical cells.
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