Science Forums Biology Forum Molecular Biology Forum Physics Chemistry Forum internal energy vs. temperature

 Physics Forum Physics Forum. Discuss and ask physics questions, kinematics and other physics problems.

# internal energy vs. temperature

## internal energy vs. temperature - Physics Forum

### internal energy vs. temperature - Physics Forum. Discuss and ask physics questions, kinematics and other physics problems.

#1
07-02-2004, 02:05 PM
 Anja Guest Posts: n/a
internal energy vs. temperature

The internal energy is directly proportional to the temperature of the
object.
why is it then not possible to measure the internal energy of a system
directly but only as a change deltaU?

#2
07-03-2004, 12:57 AM
 N:dlzc D:aol T:com \(dlzc\) Guest Posts: n/a
internal energy vs. temperature

Dear Anja:

"Anja" <[Only registered users see links. ].com> wrote in message
news:40e56b8f\$0\$200\$[Only registered users see links. ].tele.dk. ..

There is the energy that is a body's rest mass.
There is heat energy, that is a function of how much it stores when heated
to its current temperature from absolute 0.
There is EM storage in the form of electric charge, and moving electric
charge.
Energy of motion is not contained solely in the body, but shared between
the body and the observer.

I think you mean the temperature one. What property would allow you to
determine the heat-related internal energy? Do you draw inference as to
what material the body is constructed from, and based on similar
measurements on other similarly constructed bodies, infer how much energy
it takes to heat it up from absolute zero?

I think you simply do the delta U this way, because that is how much energy
it takes to get it above or below ambient. Anything else is an exercise
that yields no result.

David A. Smith

#3
07-04-2004, 01:39 AM
internal energy vs. temperature

"Anja" <[Only registered users see links. ].com> wrote in message
news:40e56b8f\$0\$200\$[Only registered users see links. ].tele.dk. ..

'Internal energy' is a very specific term in physics. It is related to the
heat content of a system, the work done by a system, and the chemical
composiiton of a system. It is usually represented by the capital letter E,
as in the following:
[Only registered users see links. ]

The chage in internal energy is not measurable by itself, but is related to
the changes in the heat content dQ and the work done by the system dW, as
*defined* in the First Law of Thermodynamics:

dE = dQ - dW

Tom Davidson
Richmond, VA

 Tags energy , internal , temperature

 Thread Tools Display Modes Linear Mode

 Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules
 Forum Jump User Control Panel Private Messages Subscriptions Who's Online Search Forums Forums Home General Science Forums     Biology Forum     New Member Introductions Forum     Chemistry Forum         Organic Chemistry Forum     Physics Forum     General Science Questions and Layperson Board         Science and Religion Forum         Zoology Forum     Environmental Sciences and Issues General Forum     Chit Chat         Science and Lab Jokes     Article Discussion     Molecular Biology News and Announcements         Conferences , Symposiums and Meetings         Molecular Station Suggestion Forum         Instructions for Posting, Help, and Frequently Asked Questions     Science News and Views         Molecular Biology Lectures and Videos     Science Careers         Post-doctoral         Medical School         Ph.D Doctor of Philosophy         Science Jobs Forum Molecular Research Topics Forum     PCR - Polymerase Chain Reaction Forum         Real-Time PCR and Quantitative PCR Forum     Bioinformatics         BioStatistics Forum     Molecular Biology Techniques         Molecular Cloning Forum         Electrophoretic Mobility Shift Assay Forum         Agarose Gel Electrophoresis Forum         BioPhysics Forum         Gene Therapy     Cell Biology and Cell Culture         Apoptosis, Autophagy, and Necrosis Forum         Flow Cytometry Forum         Transfection Forum         Confocal - Microscopy Imaging Techniques         Immunology and Host-Pathogen Interactions         Signalling Biology         Stem Cell Forum     Basic Lab Protocols and Techniques         SDS-PAGE Gel Electrophoresis Forum     DNA Techniques         DNA Extraction Forum         cDNA Forum     Epigenetics Forum: DNA Methylation, Histone and Chromatin Study         ChIP Chromatin Immunoprecipitation Forum     Protein Science         Antibody Forum             Immunoprecipitation Forum         Western Blot Forum         Protein Crystallography Forum         Recombinant Protein Forum         ELISA Assay Forum         Protein Forum     Proteomics Forum         Peptide Forum         Mass Spectrometry Forum         2-D Gel Electrophoresis Forum     Omics and Genomics Forum         Microarrays Forum         Genomics Forum     RNA Techniques Forum         RNAi and SiRNA Forum     Histology Forum         Immunohistochemistry Forum         Immunocytochemistry Forum         Electron Microscopy Forum         Immunofluorescence Forum     Protocols and Methods Forum     Molecular Biology Articles and Protocols     Animal and Molecular Model Systems         Drosophila Forum         Yeast Forum         Zebrafish Forum         Botany Forum         C Elegans Forum         Arabidopsis and Plant Biology         Microbiology Forum         Knockout Mouse Forum     Chromatography Forum Products and Vendor Discussion     Molecular Biology Products and Vendors         Bad Product/Service? Post Here         Lab Equipment Discussion and Reviews Regional Molecular Biology Discussion     Forum Chemie     Forum Biologie     Forum Biologia     Forum Chimica     Forum Physik     Forum De Chimie     Forum De Physique     Forum Chemia     中国人分子的生物学论坛 Chinese     Greek Molecular Biology Forums     分子生物学のフォーラム Japanese     ميدان فارسى. Persian Molecular Biology     [أربيك] علم ساحة- Arabic     Forum de Biologie Moleculaire     Forum Biologia Molecolare     Forum die Molekularbiologie     Foro Biologia Molecular

 Similar Threads Thread Thread Starter Forum Replies Last Post Jan Gooral Physics Forum 0 05-22-2008 02:52 PM sdr@sdrodrian.com Physics Forum 1 01-27-2008 02:53 PM Don1 Physics Forum 13 07-21-2005 12:15 PM Arnold Physics Forum 18 10-08-2004 11:56 AM cinquirer Physics Forum 24 11-19-2003 12:09 PM

All times are GMT. The time now is 09:37 AM.

 Contact Us - Molecular Biology - Archive - Privacy Statement - Top