I used that book for thermo 2, and I hated it. Try using Wark's or Cengel's. If you want a more theoretical approach, you can go for Callen's "Thermodynamics and an introduction to thermostatistics"
yes, actually, I was trying to take the curl of the Navier-Stokes equation, to get the vorticity equation, a problem in Bird's transport phenomena, the book asks you to deduce it in two forms, the first one is the one I have already, the second one involves the Levi-Civita symbol and I'm...
I know now, thank you. Actually that "identity" es not true unless Div(v)=0, because another term is missing. However that fits perfectly since im working with fluid mechanics.
Thanks again!
I finally found it, looks like I was missing another term in the right side v(Div(v)), altough this is 0 in my case because im working with fluid dynamics. Now everything makes perfect sense, thanks anyway
is this identity true?
V is a vector, so VV is a second order tensor
I have tried to prove this but the components of the tensor appear always as operands of the nabla.
Thanks!
Div(VV)=v.(Grad(V))
1. Homework Statement
I just want to check if this identity is true, since I have not found it anywhere, can anyone help me?
v is a vector (and that nu is supposed to be a v too)
Yes, actually I want to do the molecule attached, as you can see, it is not an activated system, thats why I thought I could use aromatic nucleophilic substitution
Hi!
Im a student in chemical engineering and I would like some recommendation for a fluid mechanics book, I've been using Bird's Transport Phenomena but it seems to be a bit difficult to follow it, as it skips a lot of steps.
Does anyone know if an aldehyde, specifically, acetaldehyde behaves as a good nucleophile? I'm trying to insert an aldehyde in an aromatic compound through an aromatic nucleophilic substitution, any information or source to pKa data would also be appreciated, thanks!
1. Homework Statement
I've been asked to explain how would I synthesize an organic compound, its structure is attached as an image (first attachment) , could you help me figure it out? I'm supposed to start from benzene
3. The Attempt at a Solution
So far, Ive got a big part of the...
well, the problem is that my equation is not so simple, it is actually a pretty big fluid dynamics model for calculating the viscosity of a mixture of 10 gases, so I have an equation, lots of constant properties, and Im trying to get a 10x10 matrix :S
Just an urgent doubt, im new to matlab.
So imagine an equation that has two indexes, and that can be expressed as a matrix, how can I do something like this in Matlab? using a for cycle?
(URGENT) Power series solution for ODE
1. Homework Statement
Supose there is an infinite series solution\sum b_{n}x^{n} for
u''+4(x-(1/4))^2*u+C(x) = 0 where C(x) is a function (I get it in another problem, I'll put it in the relevant equations area), determinate the coefitients b_{0}...
thanks a lot both of you, now, just another doubt, is H=C_P\Delta T+H_0 valid only for ideal gases? because Im working out another problem now, and I was planning to use the equation I got in this problem, but now it is not an ideal gas, it is air at about 25atm, is the equation valid?
1. Homework Statement
A unit mass of an ideal gas at temperature T undergoes a reversible isothermal process from pressure
P 1 to pressure P 2 while loosing heat to the surroundings at temperature T in the amount of q. If the gas
constant of the gas is R, the entropy change of the gas ∆s...
yeah, well, what i am interested in , is in finding how can I get that equation listed above, I had thought in deriving the equation for the sum of work in each phase, and finding the minimum value, however i cant set the whole thing to get that equation. Can I consider the air as an ideal gas...
1. Homework Statement
Hi I would like you guys to help me with this problem
Air is to be compressed steadily and isentropically from 1 atm to 25 atm by a two-stage compressor. To minimize the total compression work, the intermediate pressure between the two stages must be
(a) 3 atm (b) 5 atm...
I know it is useful for me, at some level, but since I share the class with pure chemistry and biology students, there are many things on the program that are not very useful for a chemical engineer, reactions that are only useful in the lab, for example there are lots of methods for producing...
I'm studying the second year of a chemical engineering degree. I have always loved mathematics, and Im pretty good at them, and since the beginning I am not satisfied with the engineering approach to mathematics, I would like to learn some more complicated math, but I'm not quite sure if I...
when its too long, it's okay to use a computer, however, dont become lazy, because probably you will need to know how to do it without a computer, for example, ive got a friend that is studying physics, and I am studying engineering, he would often talk about how great his math classes are, with...
well, I already got a warning for answering just like that, so why dont you calculate it yourself? just look for an enthalpy table and use Hess's Law, draw some lewis's structures to know which bonds are broken and which are formed
also water is very stable because of hydrogen bonds , if you want to produce Hydrogen gas just add an inorganic acid to some metal, like HCl and Al for instance, there are many other ways, like electrolysis on water