Re: [Phys-L] Temperature for the calorie?

[Horst Wahl <wahl@hep.fsu.edu>]

The most common  definition (cal 15)  is for heating from 14.5 to 15.5 
degrees C, but nowadays it is just defined in terms of Joules
(=4.1840J)
See e.g. http://www.britannica.com/science/calorie
and http://physics.nist.gov/Pubs/SP811/appenB9.html#ENERGY

On 1/27/2016 20:39, Diego Saravia wrote:
> https://en.wikipedia.org/wiki/Calorie
>
> 2016-01-27 22:26 GMT-03:00 Peter Schoch <pschoch@fandm.edu>:
>
> > Hello,
> >
> > Today I was asked about the calorie.  Yes, we did the typical definition:
> >   the amount of energy needed to raise 1 gram of water 1 degree Celsius.
> >
> > A student, a Chemistry major, raised her hand and asked "At what
> > temperature?"  She wanted to know was it at STP and then raised 1 degree,
> > or was it at 20 or 25 C...?  It seemed a reasonable thing to ask, but I
> > have no idea.  A search of the hard-copy literature on my shelves gives me
> > nothing.  A Google search isn't much help either.
> >
> > Does anyone know?
> >
> > Peter Schoch
> > _______________________________________________
> > Forum for Physics Educators
> > Phys-l@www.phys-l.org
> > http://www.phys-l.org/mailman/listinfo/phys-l

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Horst D. Wahl
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