Recent content by speny83

Homework Statement That is prove that |a•c|≤|a||c| for any vector a=<a1,a2,a3> & c=<c1,c2,c3> Homework Equations The Attempt at a Solution I really don't have much of an attempt at the solution. I am not sure where to start. I can kind of justify it in my mind by saying the...

https://www.dropbox.com/s/v0bqszxdatqcfhg/expt3.jpg appologies the above link for the image did not work

Homework Statement I am working on an experiment rite up for a physical chem class regarding the n-Hexane/Acetone azetrope. I have done my calcs, tripple checked both the data and the clacs and everything is as correct as it can be at this point (i can't change figures recorded in the lab...

can i say that So I am thinking can i say that (Tf/Ti)^c=Vi/Vf and (Pf/Vf)^(1/gamma)=ViVf so that (Tf/Ti)^c=(Pf/Vf)^(1/gamma) is this legit?

Homework Statement A nearly flat bicycle tire becomes noticeably warmer after it has been pumped up. Approximate this process as a reversible adiabatic compression. Assume the initial pressure and temperature of the air before it is put in the tire to be Pi = 1.00 bar and Tf 287K . The final...

Homework Statement So I came down with something and missed some class and am making it up from others notes which arent entirely clear plus the long weekend for turkey day and I am really hoping someone can help me make some sense of this... I am trying to come up with the derivations for...

I have no idea what your getting at. And I am sorry but its just getting me more confused trying to use something that i truly believe doesent belong in this problem. Also, I really want to understand where my though processess went wrong, not to find some abstract way of getting to an answer...

Miaq- i see your edit addition to your first comment. however that number doesn't appear to resolve anything in the problem, nor is it something we have covered in the first two chapters of this silly book they gave me. but thanks for suggesting a solution.

Miaq- I am not sure what you mean by that comment. As far as i can see R=8.3145J/kmol is the only R value that would apply...Ive never heard of each gas having their own unique R. and for that matter the solution guide (which does a horrible job explaining the solution) uses the 8.3...

Homework Statement A sample of carbon dioxide, mass 2.45g, is allowed to expand reversible & adiabaticly from 500cm3 to 3.00 dm3 What is the work done by the gas Homework Equations dw=-pexdV du=dq+dw du=nCv,mdt The Attempt at a Solution At first i just wanted to say that because...

Hi all, studying for a physical chemistry exam tomorrow morning and I'm getting really confused. I am hoping somebody has an easy to understand explanation of How a lot of this stuff works. specifically the relationships between ΔH, ΔU, q & W and constan P,V & T i.e. if P is constant how...

Homework Statement 86.9g of liquid water at 304K is heated by 1.75A passing through 24.7Ω for 104s what is the final temp Homework Equations its been a while since i did physics so bear with me if i get something mixed up here q=mCs,pΔT q=ItΔψ ψ=pot dif so isn't that just V from...

ya i screwed that up bad I=V/R and I don't have any value for V so no help...what on Earth do you do to something like this?

so if i have 89.6g water at 304K and a constant p=1.00bar and i heat it by running 1.75A through 24.7 for 105 seconds what will the final temp be? im thinking i can take q=mC(Tf-Ti) and q=IT and I=R/V to say that Tf= (Rt/vCm)+Ti i can't rember that much about physics and this stuff...

I think I've got this but not 100% sure. if a horse can heat 11.6kg ice water T=273k to 355K in 2.5 hours how high could it raise a 217kg weight in 2.5 min? heres what I've done qp=mcp,sdt=(1.16E4 g)(4.18 J K-1g-1)(82K)=3.976E6 J (3.976E6 J/2.5hr)(1hr/60min)(2.5min)=6.627E4 J...