problem in this integration

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Nasir Qazi
Nasir Qazi el 6 de Mayo de 2012
% Unable to integrate this , Please help
syms T T0
b = 0.141;cp0 = 38.12;h0 = 1684;R= 8.314;Act_W = 0.98;D_Vm = 3.0;DCP_0 = 1263; DH_0 = 1389;
cp = cp0 + b(T-T0);
h = h0 + int((cp,T,T0,T));
DCP_0/R*T + int((h/R*T^2),T,T0,T) + int((D_Vm/R*T),P,0,P) - log(Act_w)
  1 comentario
Walter Roberson
Walter Roberson el 6 de Mayo de 2012
What problem are you observing? Are you getting an error message? Which of the three integrals are you having difficulty with?
Did you happen to notice that for int((D_Vm/R*T),P,0,P) you are integrating with respect to a variable that does not appear in the expression being integrated?

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Respuestas (1)

Alexander
Alexander el 7 de Mayo de 2012
Not sure what you want to do. Could it be, that you meant this:
syms T T0 P
b = 0.141;cp0 = 38.12;h0 = 1684;R= 8.314;Act_W = 0.98;D_Vm = 3.0;DCP_0 = 1263; DH_0 = 1389;
cp = cp0 + b*(T-T0);
h = h0 + int(cp,T,T0,T);
DCP_0/R*T + int((h/R*T^2),T,T0,T) + int((D_Vm/R*T),P,0,P) - log(Act_W)
I did these changes to your code:
  • syms T T0 P instead of syms T T0
  • b*(T-T0) insteat of b(T-T0)
  • int(cp,T,T0,T) instead of int((cp,T,T0,T))
  • log(Act_W) instead of log(Act_w)

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