Electrochemistry Principles Quiz
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Questions and Answers

What unique properties of fluorocarbons enabled the development of thin, high-performance gas electrodes?

Hydrophobicity combined with gas porosity

In what year were alkaline electrolyte zinc-air batteries constructed by Heise and Schumacher?

1932

What is the primary drawback of voltaic cells using hydrogen gas?

Hydrogen gas acts as an insulator, reducing the effective area of the cathode and resulting in very low current.

What type of bonds are present in fluorocarbons?

<p>C-F bonds</p> Signup and view all the answers

What is the purpose of impregnating porous carbon air cathodes with wax in zinc-air batteries?

<p>To prevent flooding</p> Signup and view all the answers

What enabled the development of thin, efficient air cathodes in modern zinc-air button batteries?

<p>The emergence of fluorocarbons as a polymer class</p> Signup and view all the answers

What is the formula for fluorocarbons?

<p>CxFy</p> Signup and view all the answers

What is the main advantage of zinc-air batteries?

<p>Very high energy densities</p> Signup and view all the answers

What is the role of Teflon in the structure of high-performance gas electrodes?

<p>Teflon is used as a bonding agent for the catalyst structure</p> Signup and view all the answers

What class of compounds are fluorocarbons also known as?

<p>Perfluorocarbons or PFCs</p> Signup and view all the answers

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