Enthalpies Of Different Types Of Reactions
Chapter Name : Thermodynamics |
Sub Topic Code : 102_11_06_05_01 |
Topic Name : Enthalpies Of Different Types Of Reactions |
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Sub Topic Name : Standard Enthalpy Of Combustion |
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Introduction
• Combustion reactions are exothermic in nature. • Standard enthalpy of combustion is defined as the enthalpy change per mole (or per unit amount) of a substance, when it undergoes combustion and all the reactants and products are in their standard states at the specified temperature.
Pre-Requisites:
System, heat, combustion
Activity:
Energy is taken from food by combustion reactions. Burning of a matchstick is a combustion reaction.
Real Life Question:
How do we get our energy from food?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Combustion | Burning in air. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Matchstick | Burning of a matchstick is a combustion reaction. |
Real life uses :
Getting energy from food.
Places to visit :
Kitchen.
Practical examples around us
| Examples | Explainations |
|---|---|
| Matchstick | Lighting a matchstick is a combustion reaction. |
What you learn in Theory:
• Combustion reactions are exothermic in nature. Standard enthalpy of combustion is defined as the enthalpy change per mole (or per unit amount) of a substance, when it undergoes combustion and all the reactants and products are in their standard states at the specified temperature.
What you learn in Practice:
Combustion releases energy.