Subject: Thermodynamics and differentials and Maxima
From: Billinghurst, David (CRTS)
Date: Tue, 9 Apr 2002 13:14:02 +1000
http://www.math.unm.edu/~wester/demos/Calculus/Macsyma.problems
contains
(c27) /* Exact differential => d(V(P, T)) => dV/dP DP + dV/dT DT */
diff(V(P, T));
Time= 0 msecs
d d
(d27) (-- (v(p, t))) del(t) + (-- (v(p, t))) del(p)
dt dp
I couldn't find any documentation on del(), but as a wild guess I tried:
(C1) U: 'diff(U,S)*S + 'diff(U,V)*V;
dU dU
(D1) -- V + S --
dV dS
(C2) diff(U);
dU dU
(D2) -- DEL(V) + -- DEL(S)
dV dS
-----Original Message-----
From: Mike Thomas [mailto:miketh at brisbane]
Sent: Wednesday, 27 March 2002 6:28
To: Maxima List
Subject: Thermodynamics and differentials and Maxima
Hi all.
How would I express and manipulate in Maxima, equations with exact
differentials as commonly done in thermodynamics eg, go from this equation
to the next
delta U delta U
U = ------- S + ------- V + ...
delta S delta V
delta U delta U
dU = ------- dS + ------- dV +.....
delta S delta V