The usage of N i − C d battery and an alkaline battery have to be explained with some examples. Concept Introduction: Electrochemical cell is a device capable of converting chemical energy into electrical energy or induces chemical energy by electrical energy. In the galvanic cell spontaneous redox reaction takes place. Redox reaction means the reaction in which the oxidation state of the atoms changes due to the occurrence of both reduction and its complementary oxidation reactions. The element under oxidation reaction loses electron whereas the element in the reduction gains electron. Rechargeable battery work because they use reaction are reversible, while non- rechargeable battery they use reactions are non-reversible. Energy density of battery: High specific energy density batteries are attracting growing attention as possible power sources for electronic vehicles.

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Chapter 8, Problem 27Q

Interpretation Introduction

Interpretation:

The usage of Ni−Cd battery and an alkaline battery have to be explained with some examples.

Concept Introduction:

Electrochemical cell is a device capable of converting chemical energy into electrical energy or induces chemical energy by electrical energy. In the galvanic cell spontaneous redox reaction takes place. Redox reaction means the reaction in which the oxidation state of the atoms changes due to the occurrence of both reduction and its complementary oxidation reactions. The element under oxidation reaction loses electron whereas the element in the reduction gains electron.

Rechargeable battery work because they use reaction are reversible, while non-rechargeable battery they use reactions are non-reversible.

Energy density of battery: High specific energy density batteries are attracting growing attention as possible power sources for electronic vehicles.

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