CHEMISTRY COMMUNITY

Aaron_Trell_2J

I don't think you have to memorize the exact values but it would be helpful to know which conformations have higher energy values than others. You can usually figure this out by looking at which atoms are under strain (e.g. a C atom and H atom, two C atoms or 2 H atoms).

Aaron_Trell_2J

Q: Want to hear a joke about sodium hypobromite?
A: NaBrO

Aaron_Trell_2J

I believe that it is based on the electronegativity of the molecules that you are talking about. A higher electronegativity means that the molecule is more nucleophilic.

Aaron_Trell_2J

In the past I believe we have received our quizzes back in the discussion section following the quiz so you should expect to get your quiz back this week.

Aaron_Trell_2J

If given a question where it says to calculate something such as the standard enthalpies of formation then you would not use the 25 degrees celsius value in determining the number of sig figs. However, if the problem has to do with calculating something that is not at standard conditions then I beli...

Aaron_Trell_2J

Q: Anyone know any jokes about sodium? A: Na

Aaron_Trell_2J

Also, if you want to associate this change with a real world example just think about the process of boiling water vs melting ice. It is much easier to melt ice if heat is applied to it while it takes a much longer time to completely vaporize the same mass of water.

Aaron_Trell_2J

I believe that the only time that there is no change in delta S for the universe is when the system is at equilibrium. Also an isothermal reaction can still create a difference in entropy since usually in a reaction heat is either given off or added to the system. Isothermal just means that the reac...

Aaron_Trell_2J

As of right now I understand entropy to be a measure of the disorder of a system. My question is how does entropy relate to concepts such as chemical reactions and other processes?

Aaron_Trell_2J

I believe that breaking bonds absorbs energy because energy is needed in order to break a bond. For example when H2O is heated to the point where it is turning from the liquid state to gas state, constant energy is being applied in the form of heat and bonds are being broken. And on the other hand w...

Aaron_Trell_2J

Silver walks up to Gold in a bar and says, "AU, get outta here!"

Aaron_Trell_2J

Typically we only assign "x" to be a change in molarity. "x" is only used if the information we are given is not enough to calculate certain equilibrium values using the equilibrium constant equations. Typically in these cases we end up using the quadratic formula.

Aaron_Trell_2J

The term polydentate means that there is more than one ligand bonded to the transition metal. For example tridentate just means that there are three ligands attached to the transition metal.

Aaron_Trell_2J

What kind of fish is made out of 2 sodium atoms?

2 Na

Aaron_Trell_2J

I believe you can also look at all of the dipole moments in a particular molecule and if all of these vectors cancel out then you have a non polar molecule and if they don't then you will have a polar molecule.

Aaron_Trell_2J

Within the transition metals there are some special cases with electron configurations. As for silver the reason that the 4d orbital is filled out before the 5s gets filled is because silver is more stable when the d orbital is filled compared to the s orbital. There are other exceptions in the tran...

Aaron_Trell_2J

I believe that wavelength is always a positive value since it is a measured length and it would be impossible to have a negative length. Hope this helps.

Aaron_Trell_2J

Both of the equations that you mentioned can be used in the same problem (assuming you are talking about the photoelectric effect). For example if the problem asks you to calculate the energy of the light source and you are given the frequency you can simply use the equation E=h x (frequency). Howev...

CHEMISTRY COMMUNITY

Search found 18 matches

Re: Memorize C-H torsional strain values?

Re: Post All Chemistry Jokes Here

Re: More or less nucleophilic?

Re: Quiz 2

Re: Sig Figs

Re: Post All Chemistry Jokes Here

Re: Why does it take more energy for a phase change to occur from a liquid to gas than a solid to liquid?

Re: delta S surrounding vs. delta S system vs. delta S total

General Definition of Entropy [ENDORSED]

Re: Explanation of Absorbing energy vs. Releasing energy

Re: Post All Chemistry Jokes Here

Re: Change in molarity

Re: Polydentate [ENDORSED]

Re: Post All Chemistry Jokes Here

Re: Polar and Non-polar bond

Re: Electron Configuration for Transition metals? [ENDORSED]

Re: Wavelength (+ or -) [ENDORSED]

Re: Wave-Particle Duality and Equations Used