The Liquid State
Chapter Name : States Of Matter |
Sub Topic Code : 102_11_05_11_01 |
Topic Name : The Liquid State |
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Sub Topic Name : Vapor Pressure |
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Introduction
When equilibrium is established between liquid phase and vapor phase, vapor pressure at this stage is known as equilibrium vapor pressure or saturated vapor pressure.
Pre-Requisites:
volume, gas, temperature, pressure
Activity:
Food when cooked in a pressure cooker cooks fast as compared to cooking in some other vessel.
Real Life Question:
Why is a pressure cooker used for cooking food?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| vapor pressure or saturated vapor pressure | Vapor pressure when equilibrium is established between liquid phase and vapor phase. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Pressure cooker | Cook some potatoes in a pressure cooker and then separately in another vessel and observe the time it takes to cook. |
Real life uses :
Cooking
Places to visit :
kitchen
Practical examples around us
| Examples | Explainations |
|---|---|
| Pressure cooker | At high altitudes, the boiling point of water is lowered therefore food is cooked with great difficulty. A pressure cooker helps to raise the boiling point of water making cooking easy. |
What you learn in Theory:
Process of vaporization is temperature dependent.
What you learn in Practice:
At high altitudes water boils at lower temperatures, therefore a pressure cooker is used for cooking food.