Introduction
Internal energy
Substances in the internal energy Substances in the internal energy U is the basis of all the molecules in the kinetic and potential energy amount. Internal energy is related to the energy generated by the chaotic movement of molecules. Internal energy is not associated with macroscopic energy concept for moving objects energy. Internal energy is likely attributable to the microscopic energy - the movement of atomic and molecular level.
The amount of heat
The first law of thermodynamics The amount of heat energy is received by the body heat exchange process. Heat denoted by the symbol Q and SI units, in joule (J). If gas is supplied amount of heat Q, then the gas to work in A and it may increase the internal energy ΔU. Q = ΔU + A This relationship is known as the first law of thermodynamics. This law is called the law of conservation of energy, because it states that energy can change from one form to another, but it can not get lost or encounter here again.
Vielas iekšējā enerģija
Vielas iekšējā enerģija U ir visu vielā esošo molekulu kinētiskās un potenciālās enerģijas summa.
Iekšējā enerģija ir saistīta ar enerģiju, ko rada haotiska molekulu kustība. Iekšējā enerģijas nesaistās ar makroskopisko enerģijas jēdzienu par kustīgu objektu enerģiju. Iekšējā enerģija vairāk saistāma ar mikroskopisku enerģiju - kustību atomu un molekulu līmenī.
Siltuma daudzums.
Siltuma daudzums ir enerģija, kuru saņem ķermenis siltumapmaiņas procesā.
Siltuma daudzumu apzīmē ar simbolu Q un tā mērvienība SI sistēmā ir džouls (J).Ja gāzei pievada siltuma daudzumu Q, tad gāze var veikt darbu A un tai var palielināties iekšējā enerģija ΔU.Q =ΔU + AŠo sakarību sauc par pirmo termodinamikas likumu.Šo likumu mēdz saukt arī par enerģijas nezūdamības likumu, jo tas nosaka, ka enerģija var pāriet no viena veida citā, bet tā nevar pazust vai rasties klāt no jauna.
Task
This video will help you answer more correctly to the questions.
Test will consist of 9 questions and for each question will be given 3 answers.
Process
1. Internal energy is related to a energy which creates
A)...chaotic molecular motion.
B)...smooth molecular motion.
C)...microscopic energy.
2.In heathing process work is done if
A)...if the gravitation keeps the body on the ground.
B)...if the body moves gas.
C)...if the gas moves a body.
3.Gas works formula is
A)...U=32kTN
B)... A = pΔV
C)...N=mMNA
4. Heat measurements in SI units are
A)...amps
B)...joules
C)...watts
5. Which of these given examples are connected with heat exchange ?
A)...heat management
B)...heat generation
C)...heat loss
6.Convection is
A)...heat application
B)...heat return
C)... heat transfer
7.Temperature, denisity and pressure difference are cause of
A)...heat return
B)...convecion
C)...heat circulation
8.Conduction is heat transfer that
A)...takes place substances temperature due to the difference
B)...makes the heat warmer
C)...mixes heat with air
9.Conduction is possible in
A)...electronic bodies
B)...just solid bodies
C)...solid, liquid and gaseous bodies
Evaluation
To make sure you answered right, here are the right ones:
1.A
2.C
3.B
4.B
5.B
6.C
7.B
8.A
9.C