How can you figure out the sign of delta G by analyzing the qualitative characteristics of an experiment?
Q. How can you tell what the sign of delta G is for an experiment? We mixed 10 g BaOH2 with 5 g NH4SCN. The mixture became liquidy, cold, and had a piercing, stinging, bitter smell. By using Gibbs equation, delta G = delta H - temperature*delta S, I know that delta G must be negative. How can I arrive at that conclusion by looking at the experiment qualitatively?
Asked by theycallmecool - Wed Apr 12 01:34:32 2006 - - 1 Answers - 0 Comments

A. The sign of delta G can be figured out qulitatively. If a certain reaction is spontaneous, then delta G is negative but if a certain reaction is non-spontaneous, then delta G will have a positive sign.
Answered by ian71990 - Wed Apr 12 02:29:07 2006

If a process with a negative value of Delta S is nonspontaneous at constant temperature and pressure,?
Q. A.) Delta G is negative and Delta H may be positive or negative. B.) Delta G is negative and Delta H is positive. C.) Delta G is positive and Delta H is positive. D.) Delta G is positive and Delta H may be positive or negative. Delta G = Gibb's Free Energy Delta H = Entrophy Delta S = Enthalpy I know the answer is D., but i'm not sure the reasoning behind the answer. Could someone help me clarify it for me? Thanks
Asked by raliem - Mon May 26 18:28:17 2008 - - 1 Answers - 0 Comments

A. delta G = delta H - T (delta S) So if delta S is negative and T is always positive (Kelvin T), then the term -T (delta S) will be positive. If the reaction is nonspontaneous, delta G is positive. So (delta G -- positive) = delta H + (-T delta S -- positive) For delta G to be positive, delta H can be positive or negative, as long as it's not more negative than |T delta S|. Based on my reasonong, the answer is (D). By the way, delta H = enthalpy delta S = entropy
Answered by HPV - Mon May 26 18:40:12 2008

How will the Delta NW merger work out?
Q. -Will there be a new livery, newer than Delta's Citgo livery? -How will the fleets integrate, Boeing and Airbus? (Will the DC-9s stay?) -Will flight #s be worked the way US and America West did where all up to X are on Delta metal and all above X are on NW metal? Thanks
Asked by kman252 - Mon Apr 14 23:25:12 2008 - - 5 Answers - 0 Comments

A. I think the'll probably liquidate the DC-9's and keep the Airbuses initially, then eventually get rid of them too. Kind of like when AA took over TWA, and had the 717's for a while. The reason is because on the long run, the airline saves money if they have fewer types of aircraft.(maintenance,spa re parts,flight & cabin crew training). I don't see a need for new livery, they change their liver way too much anyway hahaha
Answered by joseph w - Mon Apr 14 23:51:29 2008