Hello, I am having trouble plotting this graph. Whenever I run my code I get an error that I am not using the plot function correctly or I get a blank graph. I think it may have to do with how I solved my equation for T. Thanks for any help.

To = 273

Pair = 400000

Vo = .00066667

cp = 1

syms T t

T = To - (Pair*((Vo*((T/To)^(-5/2))) - Vo)/cp)*t;

Eqn = solve(T, t)

t = 0:.001:1;

Teq = Eqn

plot(t,Teq)

[madhan ravi]

You have two definitions for T?

[Sarah Fries]

The only equation that I have for T is [T = To - (Pair*((Vo*((T/To)^(-5/2))) - Vo)/cp)*t]. Because T is on both sides of the equation I used syms to solve the equation so it is just an equation of T(temp) with respect to t(time). Then I want to graph the plot of time (t) vs Temp (T).

Answer 1

[Star Strider]

You are using the wrong plot function.

Use fplot instead:

fplot(Teq,[0 1])
xlabel('t')
ylabel('Teq')

EDIT — (27 Sep 2020 at 18:04)

Added plot image —

.

[Sarah Fries]

Thanks sm!

[Star Strider]

As always, my pleasure!