Alcohols And Phenols
Chapter Name : Alcohols, Phenols And Ethers |
Sub Topic Code : 102_12_11_04_10 |
Topic Name : Alcohols And Phenols |
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Sub Topic Name : Reactions Involving Cleavage Of O-H Bond |
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Introduction
Bond-dissociation energy (BDE) or D0, is one measure of the strength in a chemical bond. It is defined as the standard enthalpy change when a bond is cleaved by homolysis, [1] with reactants and products of the homolysis reaction at 0 K (absolute zero).
Pre-Requisites:
Alcohols And Phenols
Activity:
Wine.
Real Life Question:
What are the applications of alcohol?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Alcohol | an alcohol is an organic compound in which the hydroxyl functional group (-O H) is bound to a carbon atom. In particular, this carbon center should be saturated, having single bonds to three other atoms. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Alcohol | Alcohol is often used as a preservative for specimens in the fields of science and medicine. |
Real life uses :
Alcoholic beverages.
Places to visit :
Pharmacy.
Practical examples around us
| Examples | Explainations |
|---|---|
| Alcoholic beverage | An alcoholic beverage is a drink and psychoactive drug containing ethyl alcohol which is commonly referred to as ethanol. |
What you learn in Theory:
An HO–H bond of a water molecule (H–O–H) has 493.4 kj/mol of bond-dissociation energy, and 424.4 kj/mol is needed to cleave the remaining O–H bond.
What you learn in Practice:
The bond energy of the covalent O–H bonds in water is 458.9 kJ/mol, which is the average of the values.