Recent content by staceybiomed

I see that numerous people have viewed my post but nobody has replied. Does this mean that the problem is as difficult as I think it is? :-(

Homework Statement Using the following equations, dX/dt = uX Derive the following equation: u0*t = (KS*YX/S + S0*YX/S + X0) * ln(X/X0) - (KS*YX/S)/(S0*YX/S + X0) * ln{(S0*YX/S + X0 - X)/(S0*YX/S)} Homework Equations u =u0*S/(KS + S) YX/S = (X - X0)/(S0 -S) The Attempt at a...

I am still looking for help on this question...please help me!

I am not really good at using the specials characters, etc so please forgive me! Homework Statement a) Calculate the work required to concentrate a dilute sucrose solution. Assume that we begin with 10 wt % solution of sucrose in water and we want to end with a 30 wt % sucrose solution...

thanks - i will give this a try!

Homework Statement Integrate the following equation for average energy from -infinity to infinity \int(c*x^4)*(e^(-c*x^4)/KT)dx Homework Equations c, K, T are constants \int(e^(-c*x^4/KT)) = (KT/c)^(1/4)*(2\Gamma(5/4)) The Attempt at a Solution I tried using integration by parts...

CTAB is cetyltrimethylammonium bromide.

I am performing an experiment where I am spiking my product with various % of CTAB. I have made stock solution of 2% (w/v) CTAB in 40 mM NaCl. I also need to make sure that I maintain the NaCl conentration at 40 mM. The product that the stock solution is being added to doesn't have any NaCl...

I have since worked further on this problem and ended up with 5 equations, 5 unknowns but it just seems too complicated for this problem. Can anybody help? m2 = m' + m1 = m' + 25000 = m(Liquid)2 + m(Vapor)2 (at 7 bar) m(L)2*V(L)2 + m(V)2*V(V)2 = 70 m^3, where V(L)2=0.1108 & V(V)2=0.2727 H2...

Homework Statement A well-insulated closed tank is of volume 70 m^3. Initially, it contains 25000 kg of water distributed between liquid and vapor phases at 30 deg C. Saturated steam at 11 bar is admitted to the tank until pressure reaches 7 bar. What mass of steam is added? Homework...

Homework Statement Adiabatic Steam turbine produces 4000 kW Steam is fed at 21 bar/475 deg C Exhaust is saturated steam (P=0.1bar) Exhaust is fed into condenser where it is cooled to 30 deg C Problem asks for flow rate of cooling water supplied to condensener if water enters at 15 deg C...