Презентация " Первый закон термодинамики"

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Изобарный: постоянное давление

График P-V

10.3.2.1 - выводить формулу внутренней энергии идеального газа;



To relate pressure and volume with work done by and on a system;
To define internal energy, work and heat;
To state and explain the First Law of Thermodynamics;
To solve related problems

Expansion
расширение
кеңею

Compression
сжатие
қысу

WORK

done when the point of application of a FORCE moves in the direction of the force

W = Force x displacement

HEAT

energy in transit from high temperature object to lower temperature object ( Q )

INTERNAL ENERGY

the total potential energy and random kinetic energy of the molecules of the substance ( U )

For IDEAL GAS, the sum of the kinetic energy of molecules

It is NOT the kinetic energy of the container!

FIRST LAW OF THERMODYNAMICS

the amount of energy gained by the system must be exactly equal to the amount of energy lost by the surroundings

The P-V graph

What happened to the temperature?

How much work is done by the system?

What became of the internal energy?

YOUR TURN:

Describe the volume, pressure and temperature.


What became of the internal energy?


How much work is done by the system?

EXAMPLES

Group Work 1

In addition, sketch PV, VT and PT graphs for this.

Group Work 2

In addition, what is the ratio of the temperature in i to the temperature in f?

Group Work 3

ISOTHERMAL

First Law of Thermodynamics and the Isoprocesses

Complete the worksheet

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