Equilibrium In Physical Processes
Chapter Name : Equilibrium |
Sub Topic Code : 102_11_07_02_02 |
Topic Name : Equilibrium In Physical Processes |
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Sub Topic Name : Liquid - Vapor Equilibrium |
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Introduction
• At equilibrium the pressure exerted by the water molecules at a given temperature remains constant and is called the equilibrium vapour pressure of water. • Vapour pressure of water increases with temperature. • For any liquid at 1 atmospheric pressure (1.013 bar), the temperature at which the liquid and vapors are at equilibrium Is called normal boiling point of that liquid.
Pre-Requisites:
Boiling point, melting point
Activity:
Balancing a see saw on its fulcrum. Balance a weight balance.
Real Life Question:
Why does the boiling point of water decrease at high altitude?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Equilibrium | Balance. |
Learning aids / Gadgets
| Gadgets | How it can be used |
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Places to visit :
Kitchen, playground.
Practical examples around us
| Examples | Explainations |
|---|---|
| See saw | To balance a see saw equal weights need to be on both sides of the fulcrum. |
What you learn in Theory:
• At equilibrium the pressure exerted by the water molecules at a given temperature remains constant and is called the equilibrium vapour pressure of water.
What you learn in Practice:
• Boiling point of a liquid depends on atmospheric pressure. • At higher altitudes, the boiling point decreases as the atmospheric pressure decreases.