Thermodynamic Terms
Chapter Name : Thermodynamics |
Sub Topic Code : 102_11_06_01_06 |
Topic Name : Thermodynamic Terms |
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Sub Topic Name : The Internal Energy as a State Function - The General Case |
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Introduction
• Change in internal energy is brought about by doing work and heat. • If there is no transfer of energy as heat or as work (isolated system) i.e., if w = 0 and q = 0, then ? U = 0. • The energy of an isolated system is constant.
Pre-Requisites:
System, heat
Activity:
Heating water by immersion rod.
Real Life Question:
Does a system has
energy?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Heat | Change in energy due to temperature difference. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Pot of cold water, glass of hot water, thermometer | Put the glass of hot water inside the pot of cold water. See how the water temperature changes in both. |
Real life uses :
Different types of energy transformations take place. E.g. petrol’s chemical energy into cars mechanical energy.
Places to visit :
Bathroom.
Practical examples around us
| Examples | Explainations |
|---|---|
| Petrol is chemical energy | That changes in mechanical energy when car uses it. |
What you learn in Theory:
• It is commonly stated as the law of conservation of energy i.e., energy can neither be created nor be destroyed.
What you learn in Practice:
It is commonly stated as the law of conservation of energy i.e., energy can neither be created nor be destroyed.