CHEMISTRY COMMUNITY

Suraj Palaparty 2F

I think its only needed there to differentiate axial and equatorial, but you don't have to for line drawings.

Suraj Palaparty 2F

The case is initially at 1.00 atm, taking into account the change in pressure later in the problem, while the safe is isolated.

Suraj Palaparty 2F

E and Z refer to 2 specific substituents across a constant plane, so in the case of 1,3,5-trimethylcyclohexane you would have biz or trans relative to two of the methyl groups, which would be determines based on which side of the plane created by the cyclohexane they lie on.

Suraj Palaparty 2F

NO has a greater number of conformations as BF3 can only be configured one way, therefore it will have the higher residual entropy.

Suraj Palaparty 2F

There will never be a negative rate for the reaction so k is always positive.

Suraj Palaparty 2F

We will always told which is the slow or fast, and the slow reaction determines the rate since the fast reaction happens so quickly that its rate is not as accurate a representation of the overall rate as the reaction which takes more time to complete.

Suraj Palaparty 2F

YOOOO whats good Camryn :) Sicne EA' < EA, there has to be additional energy absorbed from the surroundings in order for the reaction to proceed, so its endothermic.

Suraj Palaparty 2F

While the dotted line represents where the molecule will separate or fuse, the line itself does not indicate whether that bond is forming or breaking.

Suraj Palaparty 2F

Similar to Gibbs Free Energy and Enthalpy, the Activation Energy of a reaction pertains to that specific reaction while the Standard Activation Energy is the energy required per mole of substance.

Suraj Palaparty 2F

For this problem you know that H20 will prefer to exist as a solid at -1, will have no preference at 0, and will prefer to exist as a liquid at 1, so using that knowledge to approximate values for the enthalpy and entropy, you will get the respective answers for each temperature.

Suraj Palaparty 2F

If a reaction is said only to be isothermal do we assume that it is an irreversible reaction or are all isothermal reactions reversible?

Suraj Palaparty 2F

A bomb calorimeter is used for constant volume calorimetry, while constant pressure calorimetry gives us the enthalpy values for that function.

Suraj Palaparty 2F

I'm still having a little trouble understanding what the "left" and "right" in microstates are and was hoping someone could explain their significance.

Suraj Palaparty 2F

I believe that the double bonds allow the Cl and the O to all have formal charges of 0, which is why they are preferred over a single bond with 3 lone pairs.

Suraj Palaparty 2F

I believe that the volume was 1.072L, so that is essentially what they were doing. In the answers it was just all left in there in order to not break up the (0.05-x).

Suraj Palaparty 2F

since Molarity is just mol/V, as long as moles are used consistently throughout the problem and the final answer is divided by the volume in order to produce a final answer as a concentration, it should still work.

Suraj Palaparty 2F

n=3, l=1

This is asking how many 3p electrons there are: 6

n=5, l=3, ml=-1

This refers to a specific sub-orbital within 5f, which has 2 electrons.

n=2, l=1, ml=0

This refers to a suborbital of 2p, which will have 2 electrons as well.

Suraj Palaparty 2F

(OH)- is hydroxo, while aqua is (H2O). Perhaps in the final it is written as (OH2)?

Suraj Palaparty 2F

For basic dilution problems, you have to divide by the new volume because molarity is defined as moles over volume. You calculate the number of moles from original and divide by the new volume.

Suraj Palaparty 2F

Yes, since the equation for calculating Kp requires the partial pressures of each individual gas, you would need to calculate them using the mole fractions.

Suraj Palaparty 2F

Yes, decreasing the pressure or increasing the temperature would cause the molecules to move further apart, which would cause more ideal behavior within the gas.

Suraj Palaparty 2F

I believe that it can be identifiable by lone pairs and the VSEPR shape, which determines how close the ligands are, although there are probably exceptions.

Suraj Palaparty 2F

To my understanding, the central atom in a molecule will almost always be hybridized, and this isn't a revision but rather a more accurate representation of how the electrons are shared within the orbitals and how the atoms interact.

Suraj Palaparty 2F

The use of double or triple bonds will largely be dependent on the number of valence electrons present as well as the number of bonds a central atom is likely to form. For example, O2 is double bonded because there are 12 valence electrons and oxygen can form 2 covalent bonds, so the presence of the...

Suraj Palaparty 2F

For the specific example that you provided (CH3OH), the Hydrogen has to branch off of the Oxygen instead of the central Carbon because Hydrogen can only form one bond, so if you had 4 Hydrogen atoms branching off of the central Carbon, then the Oxygen would have to be bonded to one of those Hydrogen...

Suraj Palaparty 2F

What factors determine the value of the work function? I didn't quite understand if that was a value given to us or if it was something we were able to calculate.

CHEMISTRY COMMUNITY

Search found 26 matches

Re: hydrogens in conformation

Re: 2012 practice final#2A

Re: E/Z

Re: Residual entropy

Re: Final 2015 7A

Re: Determining rate of formation

Re: 15.65

Re: Bonds Breaking and Bonds Forming

Re: Activation Energy

Re: Quiz 1 #7 (2014)

Isothermal and Reversible

Re: Different Types of Calorimeters

Microstates

Re: ClO2- Ion Shape

Re: 2012 Final #6B

Re: Moles or molarity in an ICE chart

Re: Question on 2012 Final Sample

Re: Is OH aqua or hydroxo?

Re: Dilution of Aqueous Solutions

Re: Partial Pressure when calculating Equilibrium Constants

Re: Real Gas Behavior

Re: Chelating Complex

Re: hybridization

Re: When to use Double and Triple Bonds

Re: Lewis Structures with multiple joined molecules

Work Function