Назовите процесс? Это сжатие или расширение?
Назовите процесс?
Это сжатие или расширение?
Изобарный: постоянное давление
Расширение- увеличение объема
Сжатие- уменьшение объема
График P-V
To relate pressure and volume with work done by and on a system;
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
WORK
done when the point of application of a FORCE moves in the direction of the force
W = Force x displacement
∆d
A
HEAT energy in transit from high temperature object to lower temperature object (
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 (
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
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?
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
YOUR TURN:
Describe the volume, pressure and temperature.
What became of the internal energy?
How much work is done by the system?
EXAMPLES 1. 2. 3. 380 J 465 J 650
EXAMPLES
1.
2.
3.
380 J
465 J
650 J
Group Work 1 In addition, sketch
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 2
In addition, what is the ratio of the temperature in i to the temperature in f?
Group Work 3 Hint: PV=nRT ; n = m/M
Group Work 3
Hint: PV=nRT ; n = m/M
ISOTHERMAL Work Heat Internal Energy
ISOTHERMAL
Work | |
Heat | |
Internal Energy |
Work | |
Heat | |
Internal Energy |
Work | |
Heat | |
Internal Energy |
Work | |
Heat | |
Internal Energy |
First Law of Thermodynamics and the Isoprocesses
Complete the worksheet
Complete the worksheet
Did we “hit” the objectives?
Did we “hit” the objectives?
© ООО «Знанио»
С вами с 2009 года.
