CHEMISTRY COMMUNITY

RHong 2J

If the rate constant is decreased, will Ea increase? Is the presence of a catalyst the only thing that effects Ea?

RHong 2J

Some cis and trans isomers are more stable, so they will have preferred conformations. For example, the trans equatorial chair conformation for cyclohexanes is the most stable form. Especially with big substituents, the energy difference between trans and cis will be greater, and so most of the cycl...

RHong 2J

Yes, try to recognize the difference between iso and sec, and tert and neo. Once you recognize what the common names are, you can use them while naming compounds!

RHong 2J

Why are tert structures called tert if they are connected to four carbons? For example, tert-butyl is connected to four carbons?

RHong 2J

First, you must find what order the reaction is. From there, you can plug in information and solve for k as long as you are given information on initial concentrations, final concentration, and time. You can also find k using half life equations as long as you know the order.

RHong 2J

We assume B and C's initial concentrations are so large that any changes in their concentration will not change the overall concentrations of B and C. We are going to observe A's concentration and so we don't assume its initial concentration is large. Any changes in A's concentration would be observ...

RHong 2J

Eo is the potential difference at standard conditions allowing us to add and subtract them like Hess's law. E, however, is the cell potential when not at standard conditions and is affected by other variables such as concentrations of products and reactants. That is why E is not a state function whe...

RHong 2J

To find Q, you do not look at the individual half reactions. You have to look at the combined, overall redox reaction in order to determine Q.

RHong 2J

The back of the book says the anode is: Sn4+ (aq) + 2e- -> Sn2+ (aq). Anodes are associated with oxidation, but wouldn't this be reduction since the product is gaining electrons? Also, why are the two half reactions flipped in the balanced equation?

RHong 2J

"i" stands for current, so the electromotive force is the limit as the current approaches 0.

RHong 2J

In the Constants and Formulas page, Cv=(3/2)R, but in the solution for 9.13, Cv=(5/2)R. How do you know which value to use?

RHong 2J

I am doing the quiz prep from 2011, and for number 9, it says to calculate standard reaction entropy using standard molar entropies. The answer has units of J/K*mol, but I thought standard reaction entropies are just J/K. Why is there a 1/mol in the units of the answer?

RHong 2J

How do you determine the degeneracy and the amount of different energy states there are? For example, are there any key words which hint that the system has two, three, or four states? When given a molecule, how can you determine the degeneracy?

RHong 2J

Why is it necessary to break both bonds in a double bond rather than just break one when doing bond enthalpy problems?

CHEMISTRY COMMUNITY

Search found 14 matches

Rate constant and Ea

Re: Importance of Cis and Trans Isomers

Re: naming compounds

Tert- structures

Re: Rate Constant K

Re: Equation to find k when there's more than 1 reactant

Re: E as a Path Function

Re: How to calculate Q in Nernst Equation

Textbook problem 14.11 e)

Re: Electromotive

Values for Cv and Cp

Units

Energy States and Degeneracy

Breaking Double Bonds