Difference between revisions of "Talk:First Law of Thermodynamics"
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The differentials for heat and work need to be changed to inexact differentials | The differentials for heat and work need to be changed to inexact differentials | ||
:Explain the differentials. [[User:Karajou|Karajou]] ([[User talk:Karajou|talk]]) 12:28, 20 November 2016 (EST) | :Explain the differentials. [[User:Karajou|Karajou]] ([[User talk:Karajou|talk]]) 12:28, 20 November 2016 (EST) | ||
| + | ::The internal energy is an exact differential as internal energy is a function of state. That is to say that how it changes is independent of the path taken between two states. | ||
| + | ::Heat and work are inexact differentials as they do depend on the paths taken. | ||
| + | ::Consider this diagram [[click here|http://www.antonine-education.co.uk/Image_library/Physics_5_Options/Applied_Physics/App_04/Cycle_1.gif]] | ||
| + | ::The work done on the gas is proportional the area under the path taken. You can see that going from b to c directly more work is done that if we go from b to a to d to c. | ||
| + | ::Basically, for heat and work, the <math>\,d</math> need to be changed to <math>\delta</math> | ||
Revision as of 17:50, November 20, 2016
The differentials for heat and work need to be changed to inexact differentials
- Explain the differentials. Karajou (talk) 12:28, 20 November 2016 (EST)
- The internal energy is an exact differential as internal energy is a function of state. That is to say that how it changes is independent of the path taken between two states.
- Heat and work are inexact differentials as they do depend on the paths taken.
- Consider this diagram http://www.antonine-education.co.uk/Image_library/Physics_5_Options/Applied_Physics/App_04/Cycle_1.gif
- The work done on the gas is proportional the area under the path taken. You can see that going from b to c directly more work is done that if we go from b to a to d to c.
- Basically, for heat and work, the
need to be changed to 
