Hi all,
I've been studying chemical engineering for three years now and will be entering my senior and final year next year. This year I found my quantum chemistry/mechanics course very interesting and enjoyable. I also found that I'm pretty good at it. I feel like I might be more...
The exact question I have to answer isn't about Molar and Molal volume but I need molal volume to plug into the equation for diffusivity coefficients. I have the molar volume of vitamin E 603cm^3/mol and its MW 430.7 and I need to find its molal volume cm^3/(g*mol) but I'm getting pretty...
although pressure cannot be specific is this calculation of pressure correcT? what I mean is will the pressure calculated here work for the rest of the problem?
also how do I know this is an isentropic process
Homework Statement
Propane at 350 degrees Celsius and 600cm^3 / mol is expanded in a turbine. The exhaust is atmospheric. What is the lowest possible exhaust temperature? How much work is obtained? You may assume ideal gas behavior and the heat transfer to the surroundings is negligible...
to the person saying the real world is a piece of cake you should really think about that, just because your job is so accommodating don't think everyone is so fortunate. Trying working 2 jobs to support your family, and I don't mean office jobs I mean manual labor or construction see how...
I worked out a solution let me see what you think(i was thinking something sorta like what you said)
I said change in internal = Q and changein internal is the integral from 373 to 280 of the C for copper which is 2.723/8.314(which is R) in my book dT (my book gives C's in Cp/R for some reason)...
Homework Statement
A 10-kg block of copper is initially 100 degrees celsius. It is thrown into a very large lake that is 280K. What is the entropy change of the piece of copper. What is the entropy change of the universe?
Homework Equations
The Attempt at a Solution
I know that...
Homework Statement
take the wronskian of [cos(theta)]^2 and 1+cos(2theta)
Homework Equations
The Attempt at a Solution
so I set up the determinant
[cos(theta)]^2 1+cos(2theta) as my y1 and y2 respectively and
-2cos(theta)sin(theta) and -sin(2theta) as my y1 and y2 prime...
Homework Statement
Consider filling a cylinder of compressed argon from a high-pressure supply line. Before filling, the cylinder contains 10 bar of argon at room temperature the valve is then opened, exposing the tank to a 50 bar line at room temperature until the cylinder reaches 50bar...
Homework Statement
A rigid container of volume 1 m^3 contains saturated water at 1MPa. If the quality is .10, what is the volume occupied by the vapor.
Homework Equations
The Attempt at a Solution
I wanted to use the equation v=(1-x)(v_l)+x(v_v)
where all v's are specific...
its from a problem in my book engineering and chemical thermodynamics by milo koretsky its in a homework problem it just says remember hte equation for pressure based on altitude is : and has it but i have never seen it before.
Homework Statement
At what temperature does water boil on the top of mount everest, elevation z = 8848m?
Recall that the dependence of pressure with altitude is give by:
P=P_atm * exp(-MWgz/RT)
MW=molecular weight of the gas, P_atm =atmospheric pressure, g is the gravitational...
Homework Statement
Hello, this isn't a specific problem but a part I am confused about in Stoke's theorem. In my text the section on Line integrals (if C(t) is the parameterization of the curve) as the integral of F(C(t))*C'(t) but for vector fields the formula becomes the integral of...
ah ok well that makes me feel better than because my prof won't care about simplification, I had the same feeling as you about me not seeing it so I just went ahead and calculated the integral out but I got a different answer. And I got the other problems in the set correct, I just wanted to be...
Sorry if I caused confusion I typed that mess up fast cause I didn't want you to think I wasn't going to respond, I am saying mine and the text's answer vary because of what we got for the cross products. I have the same exact thing as the text for the Parametrization and the Vector field...
hey thanks, my surface I have parameterized as (3cos(theta)sin(phi),3sin(theta)sin(phi),3cos(phi)) 0<theta<2pi 0<phi<pi/2
the cross product came out to 9sin(phi)*<cos(theta)sin(phi),sin(theta)sin(phi),cos(phi)> I didn't actually do this cross product but in the chapter of my text the normal...
Homework Statement
F=<0,3,x^2> computer the surface integral over the hemisphere x^2 + y^2 + z^2 = 9
z greater than or equal to 0, outward pointing normal.
Homework Equations
The Attempt at a Solution
I don't know why I keep getting this problem wrong. The general formula for...