Recent content by cns

I was thinking that since the lowest x value is 0 and we know that the SD is 25 isn't there some way to figure out using the SD how far away the mean (midpoint) is from 0? thanks

I am given that the lowest value on a graph is 0 and that it's SD is 20, but I need to find the mean? How would I do that? I would think to use the Z-test formula but I keep getting 0 which is wrong for sure since 0 is the lowest value of the graph Thanks

Thanks Andrew, This is the proof in my book for isothermal conditions for why DU and DH = 0 DH=n*Cp*ln(v2/v1)*(T2-T1) since no change in temperature DH = 0 Is this correct? because I thought the DH = q so DH shouldn't = 0. thanks again

sorry, I should have defined them dH= Enthalpy dG=free energy My main question is why is DH=0 when you have an isothermal and reversible process against an external pressure of 1 atm? thanks

In an Isothermic and reversible condition why is DH=0? (D=delta) I can understand that DU=0 but DH? but why would DH not change? DH should also =0 if it was an adiabtic and irreversible condition? since DH=dq/T -> as long as there is no heat transfer DH=0? Since it's reversible would...

thanks I think I got it. Its just I straight vertical line down then across to where the final pt is suppose to be cheers :D

What's the difference in the PV graph for a reversible process vs. an irreversible process? I know for adiabtic you would get a smooth (log like) downwards cruve if it's reversible but what about ireeversible? Thanks

I know work for reversible + isothermal is w=nRTln(v2/v1) but what about irrev? I see the equation W=P(delta V) used all the time. Is this the correct one to use? or is there another equn for irreversible work for a gas? THanks

I am working on some basic derivations for thermodyhnamics, my book doesn't explicitly state things so I am not sure if my current assumptions are correct? 1) All state functions (U,T,P,G,A) are exact differentials AND all non-state functions are INexact differntials. So if I take the 2nd...