Chapter 1 Introduction

1st Law of Thermodynamic

• Heat is one type of energy ,and it can change each other with work and energy.
• Energy can't be destroy but can change form----conservation of energy.
• Here is a video of example of conservation energy.

The importance of dimension and unit

• In engeering course we should know about the dimension and SI unit.
• Here is a list  of dimension and it's unit.http://www.ebyte.it/library/educards/siunits/TablesOfSiUnitsAndPrefixes.html

Systems and control volume

• Systems-the quantity of matter or region in space chosen for study
• System boundary- system boundary can separate in to two ,that is Open and Closed.

Closed system=one in which heat and work crosses the system when undergoing a process without any mass transfer.

Open system=one in which heat and work crosses the system when undergoing a process with  mass transfer.

Properties of a system

• In the properties of system is any measurable  characteristic of a system.
• Separate in to two type ,Extensive properties and Intensive properties.
• Extensive properties =mass dependent (volume)
• Intensive properties = mass independent ,eg(temperature, density)
• Extensive properties can change to Intensive properties by divide by Mass.

Zeroth law of Thermodynamic

• If two body are thermal equilibrium with a third body,they also in thermal equilibrium with each other.

International Temperature scale

Pressure

• That is the pressure unit table.
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Time to take a rest

Thx all from group 1. Thank you.