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Solve a system of 7 nonlinear equations with 7 variables?

Hello, everyone. I am a learner of Mathematica. I want to solve a CSTR system of 7 nonlinear equations consists of 6 mass balance equations and one energy balance with 7 variables. But NSolve can't solve and findroot doesn't give me realistic solutions. Can someone help me out? thank you.

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CSTR.nb
POSTED BY: Jake Chen
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Bill Nelson
Bill Nelson
Posted 6 years ago
POSTED BY: Bill Nelson
POSTED BY: Tim Laska
POSTED BY: Jake Chen
POSTED BY: Tim Laska

That’s a really big problem. I have rewrite to 3 equations. You are lifesaver.
POSTED BY: Jake Chen

hey. I found 7 equations won't change even these 5 reaction are not all linearly independent since there are 6 species corresponding to 6 mass balances and 1 energy balance. But I still can reduce my 5 reactions to 3 reactions, simplifying my 7 equations.
POSTED BY: Jake Chen

Can someone help me for this problem? I will really appreciate your help.
POSTED BY: Jake Chen

Did you give FindRoot realistic starting values?
POSTED BY: Frank Kampas

I don’t know what’s the realistic starting values because it is too broad for this system. I only know the range maybe 1000-2000 for T
POSTED BY: Jake Chen
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