problem in this integration

 % 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)

[Walter Roberson]

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?

Answer 1

[Alexander]

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)