Applications
Chapter Name : Thermodynamics |
Sub Topic Code : 102_11_06_02_03 |
Topic Name : Applications |
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Sub Topic Name : Enthalpy, H A Useful New State function |
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Introduction
• The heat absorbed at constant volume is equal to change in the internal energy. • ?H is negative for exothermic reactions which evolve heat during the reaction. • ?H is positive for endothermic reactions which absorb heat from the surroundings.
Pre-Requisites:
Internal Energy
Activity:
Melting ice.
Real Life Question:
Melting of ice require absorption of heat?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Enthalpy | Enthalpy is the heat required during a chemical process. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Melting ice, burning a matchstick | Melting of ice requires heat and releases energy, Burning match needs energy. |
Real life uses :
Places to visit :
Kitchen.
Practical examples around us
| Examples | Explainations |
|---|---|
| Melting ice | Melting ice is an exothermic process. |
What you learn in Theory:
• ?H is negative for exothermic reactions which evolve heat during the reaction and ?H is positive for endothermic reactions which absorb heat from the surroundings.
What you learn in Practice:
Melting ice is an exothermic process.