Recent content by jake222

Okay. So it's been about 5 years since I had general chemistry, so please forgive me if this is wrong. After reading your explanation (thanks so much), I decided to the determine the concentration of the negative charges (so that I could multiply it by 5) and then determine the pH. So here's...

Homework Statement Calculate the pH of a solution of L-glutamic acid in which the ionic species with a net charge of -1 is 5 times greater than that of the isoelectric structure. (Refer to pKa Table at end of problem set). Homework Equations pKa for glutamic acid: -COOH = 2.19...

Oh, okay. I see now. Thanks so much!

Alright, so I solved this equation (using \epsilon = 1): qtot = \epsilon\sigma(Ts4 - Tsurr4)*2\piRL using 2 kW for qtot and I got Ts = 1294.3 K. So... what does that mean? I guess I'm confused on where you can draw the line of whether or not there is significant heat transfer due to...

But how can I see if the radiation heat transfer is significant if I don't know a surface temperature?

Homework Statement Two students, A and B, are discussing a heat transfer problem regarding what the surface temperature of a cartridge electrical heater would be when exposed to a water flow (CASE 1) and an air flow (CASE 2). Case 1: hw = 5000 W / (m2 * K); Tsurr = 20ºC Case 2...