QQuestionChemistry
QuestionChemistry
"Which of the following best describes a galvanic cell?
A. A battery that requires energy to charge it
B. A battery containing an acid and a base
C. A battery containing a spontaneous redox reaction
D. A battery containing a nonspontaneous reaction"
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Answer
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Step 1:Let's solve this step by step:
Step 2:: Understanding Galvanic Cells
A galvanic cell (also called a voltaic cell) is an electrochemical device that converts chemical energy into electrical energy through a spontaneous redox reaction. This means the chemical reaction occurs naturally without external energy input.
Step 3:: Analyzing the Key Characteristics
- The reaction in a galvanic cell occurs spontaneously - Chemical energy is converted to electrical energy - No external energy is required to drive the reaction - The reaction produces an electric current
Step 4:: Examining the Options
A. A battery that requires energy to charge it - This describes an electrolytic cell, NOT a galvanic cell - Incorrect B. A battery containing an acid and a base - While some galvanic cells might involve acids/bases, this is not a defining characteristic - Incorrect C. A battery containing a spontaneous redox reaction - This EXACTLY describes a galvanic cell - The reaction occurs naturally and generates electricity - Correct D. A battery containing a nonspontaneous reaction - This is the opposite of a galvanic cell's definition - Incorrect
Final Answer
A battery containing a spontaneous redox reaction Key Insight: In a galvanic cell, the spontaneous redox reaction drives electron flow, generating electrical energy without external input.
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