Thermodynamic Terms
Chapter Name : Thermodynamics |
Sub Topic Code : 102_11_06_01_01 |
Topic Name : Thermodynamic Terms |
|
Sub Topic Name : System And Surroundings |
|
Introduction
• The study of these energy transformations is called thermodynamics. • The laws of thermodynamics deal with energy changes of macroscopic systems. • Thermodynamics only deals with initial and final states of a system undergoing the change. Laws of thermodynamics apply only when a system is in equilibrium. • A system in thermodynamics is a space in which observations are made and remaining space constitutes the surroundings. • The surroundings include everything other than the system. • The wall that separates the system from the surroundings is called boundary.
Pre-Requisites:
Energy, transformation, equilibrium
Activity:
Various types of systems are present around us. Example a boiling pot of water, the universe, the solar system, etc.
Real Life Question:
How does a car run on gas, petrol or diesel? How do humans take energy from food?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Thermodynamic system | • A system in thermodynamics is a space in which observations are made and remaining space constitutes the surroundings. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Water, food colour, glass | Take water in a glass and add food colour into it. The glass of water + food color is the system and the room where the glass is kept is the surroundings. |
Real life uses :
Thermodynamic systems help energy transformations. E.g. converting chemical energy of battery to electrical energy for lighting a torch.
Places to visit :
Kitchen, garage
Practical examples around us
| Examples | Explainations |
|---|---|
| Boiling pot of water | Water boiling in a pot is example of a thermodynamic system. |
What you learn in Theory:
Thermodynamic systems are spaces where energy transformations take place.
What you learn in Practice:
There are huge numbers of small thermodynamic systems everywhere.