Spontaneity
Chapter Name : Thermodynamics |
Sub Topic Code : 102_11_06_06_01 |
Topic Name : Spontaneity |
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Sub Topic Name : Enthalpy And Spontaneity |
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Introduction
• All naturally occurring processes whether chemical or physical will tend to proceed spontaneously in one direction only. • For example, a gas expanding to fill the available volume, burning carbon in dioxygen giving carbon dioxide. • A spontaneous reaction is one which occurs immediately when contact is made between the reactants.
Pre-Requisites:
Enthalpy, lattice structure, energy, exothermic, endothermic
Activity:
Lighting a matchstick.
Real Life Question:
How do products form when reactants come in contact?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Spontaneous reaction | • A spontaneous reaction is one which occurs immediately when contact is made between the reactants. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Burning a candle | A candle spontaneously starts burning when the wax comes in contact with the flame. |
Real life uses :
Lighting a matchstick, candle.
Places to visit :
Kitchen.
Practical examples around us
| Examples | Explainations |
|---|---|
| Lighting a candle | Wax particles spontaneously burn when they come in contact with fire. |
What you learn in Theory:
• A spontaneous reaction is one which occurs immediately when contact is made between the reactants.
What you learn in Practice:
Spontaneous reactions take place everywhere.