Equilibrium In Physical Processes
Chapter Name : Equilibrium |
Sub Topic Code : 102_11_07_02_01 |
Topic Name : Equilibrium In Physical Processes |
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Sub Topic Name : Solid - Liquid Equilibrium |
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Introduction
• Rates of transfer of molecules from ice into water and of reverse transfer from water into ice are equal at atmospheric pressure and 273 K. • Ice and water are at equilibrium only at particular temperature and pressure. • For any pure substance at atmospheric pressure, the temperature at which the solid and liquid phases are at equilibrium is called the normal melting point or normal freezing point of the substance.
Pre-Requisites:
Equilibrium, Gibbs energy
Activity:
Balancing a see saw on its fulcrum. Balance a weight balance.
Real Life Question:
How are things balanced?
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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Real life uses :
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:
• Rates of transfer of molecules from ice into water and of reverse transfer from water into ice are equal at atmospheric pressure and 273 K. • Ice and water are at equilibrium only at particular temperature and pressure. • For any pure substance at atmospheric pressure, the temperature at which the solid and liquid phases are at equilibrium is called the normal melting point or normal freezing point of the substance.
What you learn in Practice:
Balance is required in reversible reactions.