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Work, Heat and change in state variables - How to express energy transfer in numbers

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they gentlemen I would like to welcome you to our calls physical chemistry 101 my name is Dr. allow topic with the years I want to express energy exchange in number date about roses variables heat and brown heat and work on not properties of but you can't say that no amount of heat or the amount of work in society and you always associated with the changes processes who describe energy plans for between the system and its surroundings or witnesses 1 and this is the so-called signed convention involving the nodes unambiguously the final energy transfer if the system receives a verb from surrounding is surroundings doesn't work then this bird is considered to be positive and you have a positive sign similarly we describe key that enters the system from the outside and positive quantity or it's like looking at all processes of energy chief change from the perspective of this is he was auction is the system gains energy Rose this is the quality amount of heat can be referred to as and those of under the if a process is evolving to the output of our the system expands again the next time rational what users seek to the surroundings reviewing with negatives science or and she's if he was let you know the process is referred to as an act of war
this sign convention correlates with the requirement that the changes of state variables in bed and these must always be calculated as the difference between final state lenders minus the initial state this example but it get where the needs of the pressure should be held constant system expands and performs well again in this time Russia so initial state and finds state obviated work has been done by this FIL sign convention calls for W to be made he has been absorbed by the system and he you thought the process is an angle of 1 and what has been we control this process and the PDQ
diagram it corresponds to neither by between the by and by the way each kind phase diagram corresponds to a state each line in the face by a grammar that we has a bar corresponds to process it changes and we'll have another animal learning process that the absorption of water Starting with all eyes at you only reason in particular we wanted red cabbage pieces on the basis of block a
variables candidature in 270 patterns corresponding to when you that on the call the tree plot absorbed cheeks or more precisely the specific heat in Jewish program we start 273 kelvin and 1 gram of solid Phys if we add heat with temperature would initially not change the ice absorbs heat and mad at constant temperature after having that's almost 300 and but you looking digest company not to liquid water or 270 we can if you continue to add he attended job losses and the increase in temperature correlates very about on the floor to reach 373 guidance there's 1 runs in fact we defer the 400 and 800 you was looking at 373 haven't further heat adsorption of provided temperature agrees but again in a phase change the water evaporates to the to that end 57 jewels are required to vectorize 1 gram of water in 1 rounds additionally that increases in temperature of steel about 300 and we had this block is of the operation of the pure substance for such diagrams are measured and interpreted in thermal and that is we will discuss this diagram 273 yet and the reaction the news we have he does not cause a change in temperature this is what we call the late the in detail the measures to enhance innate the specific heat of fusion of reality and let me he was the rent and specific he don't vectorization all to about 250 and thousand interest for sensitivity on the other hand if all of associated without antigen the life was certain kind change or more precisely formulated this you know all this graph this call heat capacity capital the if based on 1 gram of from the speed of the fifties heat capacity see certain She's B is almost constant for water between 2 orders of me and me and and it takes 400 in 18 June was for the temperature water to rise by 1 on an but is she is 4 comma decimal 1 The program and as little because the capacity conversely he may have related by integrating the heat capacity to see time in this way so that he is often calculated from 200 if I know the initial temperature the final temperature possibly have in the but differentiating the just the Qt diagram if we get a plot of the heat capacity of a function of temperature this block of extended to Medicaid flattened languages for
more than a specific that you have about to you was program and as expected the singularity at London's arms new patterns with latent heat the other goes to infinity between 2 events and is beyond 373 K and the graph shows the constant impacted your it border 4 point 1 8 due to the random pattern but a singularity actually 100 and 7 because and about 170 because is the city capacity of water vapor or 1 point 8 aging was red and whose shot was muted by differentiating the previously captured diagram conversely a calculate amount of heat by integrating the the relationship between
temperature difference and that if he is fundamentally regional current currently the signs of making heat if you go to aid at the high temperature and system beat but initially low temperature all connected by a conductor but the equilibrium can that he flows from a B and
reside in the same file temperature in both the the change in
temperature that people system aid is negative the process for system a at the end of Western being the process will and on the temperature changes better to use some 80 and piece are being who generally not be equal however what is the is the amount of heat but was a baby given all by 80 is equal to the negative of use of the at solved by if you calculate the energy from the temperature differences using the capacity you end up with this relationship the fundamental to the creation of Korea contact
Jimenez became head on tournament heat capacity the basically
creation and thus far on this earth indicating cans of fuel and the heat capacity is constant here are a few numbers who are already
familiar with this the capacity of liquid water 4 point 1 she was because all 4 point 1 8 children with a kilogram it eager using on additional unit of heat 1 large has really great kilograms and if you prefer downloaded to program you interested in the motor the capacity of capital C sub p and under a specific to 1 mode of quantities you merely have multiplied by the mole what 1 1 times speaking and up with satisfy what to non-Jews prepared and and the capacity of liquid water it's more than twice as large as the pure solvent all the 84 in fact a
specific properties of many substances other consistently smaller than the value for water
well the outcast that all of these grows variable the past is always to be specified substrates and in the you know the answer of very bad on either part that respect we want 1 gram of to the 850 5 point can ML to warm up by 1 can you might have heat required depend on the process is carried out in not on isobaric with other current heating the water is being held constant you imagine closed 1 to his candidature by 1 heading 0 point that she was a key after being honest currently at carrying out temperature rise I have directed the walls of his system have to be moving imagine imagine noble intent can play when it is on the increase slightly at temperature increase of 1 degree not requires 1 comma decimal 0 and you he or and as a guarantee obviously you have guarantees his larger than the so by the car and other barrier heat capacities of different to accordingly
the keratin substance P and need to the difference between the that p and the that we is particularly and not for in addition the heat capacity is all gasses show a number of interesting phenomena for gasses the ratio season appeal was the 3rd we live so and had that coefficient kappa is related to the model structure and saying that and go like under nearly a moment where you go kappa turns out to be 1 comma decimal 6 diatomic gasses show a couple value of 1 comma decimal 4
another remarkable feature of the properties of gasses the difference between the isobaric motor the capacity and the Department for the tea at all with a value of about 8 comma decimal 3 June Mowinckel and this is me I guess the answer we've talked a lot about gross
variability not his statements on well this false times displacement and as you might remember activated to work this case that brought fast conditions gravitational well is enron times g times H the stretching frame a slightly more complicated because of possible things is that I think will is 1 hot he as square in Electrical Engineering removed charges peas the entity temperamental currents the what we detrimental threat to the field of wattage electrical work is you time our times T I have is the challenge it the pressure would work well PV work is very low and if system that expands or congresses movement under pressure around exchanges P. we worked with the surroundings if the contrast any from 800 thousand 50 8 comma decimal 7 really close to a hundred comma decimal 8 hidden the surroundings you work on this this we wouldn't have been but false has acted on a that results from the external pressure if P Exxon times the area a of this the PAP evolved from from changes volumes to DVD over in so again the formula for PV wrote to minus P of X and the
time you read the Nikkei signs
mandatory due to the sign convention the positive value of the Internet and value the dotted if you start addresses constants and equally time pressure period were simply dog equals minus T that but people can be
represented in the pv diagram as an integral an area on the corresponding line from to find so we end up with a hero points to 9 Newell
please and a summary and in the
form of he attended have dated from temperature difference as each you'll be equals that of the times and people have a pair of data from 1 and change to D W equal to minus tease out there you thanks for watching CNN
Base
Herzfrequenzvariabilität
Physikalische Chemie
Elektronegativität
Elektronentransfer
Primärelement
Topizität
Genexpression
Systemische Therapie <Pharmakologie>
Chemischer Prozess
Herzfrequenzvariabilität
f-Element
Wasser
Druckausgleich
Flussbett
Systemische Therapie <Pharmakologie>
Chemischer Prozess
Primärelement
Stahl
Phasengleichgewicht
Reaktionsführung
Montelukast
Wasser
Fettglasur
Zellfusion
Molwärme
Konkrement <Innere Medizin>
Edelstein
Altern
Herzfrequenzvariabilität
Bukett <Wein>
Körpertemperatur
Interkristalline Korrosion
Antigen
Operon
f-Element
Abschrecken
Funktionelle Gruppe
Schussverletzung
Expressionsvektor
Chemischer Prozess
Körpertemperatur
Tieftemperaturtechnik
Systemische Therapie <Pharmakologie>
Primärelement
Körpertemperatur
Systemische Therapie <Pharmakologie>
Chemischer Prozess
Konservendose
Quellgebiet
Molwärme
Additionsreaktion
Primärelement
Chemische Eigenschaft
Verhungern
Abschrecken
Wasser
Molwärme
Azokupplung
Keratine
Chemische Struktur
Tiermodell
Körpertemperatur
Alkoholgehalt
Substanz P
Paste
Wasser
Molwärme
Systemische Therapie <Pharmakologie>
Chemischer Prozess
Gasphase
CHARGE-Assoziation
Herzfrequenzvariabilität
Primärelement
Chemische Eigenschaft
Chemische Formel
Querprofil
Krankheit
Druckausgleich
Tee
Systemische Therapie <Pharmakologie>
Strom
Gasphase
ISO-Komplex-Heilweise
Druckausgleich
Periodate
Querprofil
Körpertemperatur
Thermoformen

Metadaten

Formale Metadaten

Titel Work, Heat and change in state variables - How to express energy transfer in numbers
Serientitel Physical Chemistry
Autor Lauth, Günter Jakob
Mitwirkende Lauth, Anika (Medientechnik)
Lizenz CC-Namensnennung - keine kommerzielle Nutzung 3.0 Deutschland:
Sie dürfen das Werk bzw. den Inhalt zu jedem legalen und nicht-kommerziellen Zweck nutzen, verändern und in unveränderter oder veränderter Form vervielfältigen, verbreiten und öffentlich zugänglich machen, sofern Sie den Namen des Autors/Rechteinhabers in der von ihm festgelegten Weise nennen.
DOI 10.5446/34683
Herausgeber Günter Jakob Lauth (SciFox)
Erscheinungsjahr 2013
Sprache Englisch

Inhaltliche Metadaten

Fachgebiet Chemie, Physik

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