CHEMISTRY COMMUNITY

Hamilton Oh Dis 3L

Why is CO2 an electrophile

Hamilton Oh Dis 3L

Don't Cl and Br both have atomic numbers of 7? How would one determine which has priority regarding cis/trans?

Hamilton Oh Dis 3L

When is AX2E2 linear instead of bent?

Hamilton Oh Dis 3L

there is the eq: deltaS = nRln(V2/V1) and the eq: w = -nRTln(V2/V1) if you multiply the first equation by -T you get -TdeltaS = -nRTln(V2/V1) which is the same as the second eq So w = -TdeltaS When that is substituted into the Gibbs eq. deltaG = deltaH + w which means deltaG = q + w = deltaU How doe...

Hamilton Oh Dis 3L

there is the eq: deltaS = nRln(V2/V1)
and the eq: w = -nRTln(V2/V1)

if you multiply the first equation by -T you get -TdeltaS = -nRTln(V2/V1)
which is the same as the second eq

Does that mean w = -TdeltaS???? (during reversible isothermal conditions)??

Hamilton Oh Dis 3L

Why is the increasing standard molar entropy in the following order:

CH3F < CH2F2 < CHF3 < CF4

Hamilton Oh Dis 3L

For Q6A in the Winter 2012 Midterm in the back of the course reader, Gibbs energy was determined based on a "balanced" chemical equation that had 9/2 as one of its coefficients. Doesn't the chemical equation have to be completely balanced to solve for Gibbs?

Hamilton Oh Dis 3L

If a battery is doing work, why is the amount of work that leaves the system negative?

Hamilton Oh Dis 3L

Is the breaking of a bond always endothermic? If not, when would it not be?

Hamilton Oh Dis 3L

When calculating the enthalpy of a reaction, why is the breakdown of reactants positive and the formation of products negative. Doesn't breaking bonds release energy meaning that deltaH is negative?

Hamilton Oh Dis 3L

what is the logic/explanation behind the boltzmann equation. how is it relevant?

Hamilton Oh Dis 3L

Why does a reversible reaction always do more work than an irreversible reaction?

Hamilton Oh Dis 3L

Am I correct in saying that the Henderson-Hasselbalch equation only works for weak acids and bases that have very small K values (x<10^-4)?

Hamilton Oh Dis 3L

Is pH and pOH always given to the hundredths place?

Hamilton Oh Dis 3L

In problem 12.57 from the textbook, the number of sigfigs given is 2. However in the solutions manual, different parts of the problem have different sigfigs. -Ka from part a has 1 sigfig while Kb from part 2 has 2 sigfigs pKa from part a has 2 sigfigs while pKb from part 2 has 3 sigfigs Are these ty...

Hamilton Oh Dis 3L

Does a low pKa value or a low pKb value correspond to higher strength of the acid or base?

Hamilton Oh Dis 3L

How is the -CH3 group in acetic acid less electron withdrawing that the -CCl3 group in trichloroacetic acid?
what does electron withdrawing mean?

And how is formic acid a stronger acid that trichloroacetic acid?

Hamilton Oh Dis 3L

How does a higher electronegativity of the atom bonded to the oxygen mean more stability? (ex: Cl-O-H vs Br-O-H)
What does this have to do with resonance and electron induction?

Hamilton Oh Dis 3L

A problem on the post assessment is: 21. A mixture of 2.5 moles H2O and 100 g of C are placed in a 50 L container and allowed to come to equilibrium subject to the following reaction: C(s) + H2O (g) ⇌ CO (g) + H2 (g). The equilibrium concentration of hydrogen is found to be [H2] = 0.040 M. Calculate...

Hamilton Oh Dis 3L

Why is the water named before the cyanide in Aquapentacyanidocobaltate (IV) ion when C comes before O alphabetically?

Separate question:
Why is the charge for Cobalt 3+ in [Co(SO4)(NH3)5]+
And why does the (NH3) go after (SO4) when N is before S alphabetically?

Hamilton Oh Dis 3L

For a MOT diagram for a heteronuclear bond, which atom is placed above the other?

Hamilton Oh Dis 3L

Which is more ionic and why? Would you be able to solve this without knowing specific electronegativities?

Hamilton Oh Dis 3L

How would one know that that H is bonded to one of the oxygen atoms instead of the central S atom?

Hamilton Oh Dis 3L

Why does AX3E2 form a T-shape? Shouldn't it be trigonal planar with the two lone pairs on opposite sides from each other (180degrees)?

Hamilton Oh Dis 3L

How is Beryllium able to stay stable with only 4 valence electrons?

Hamilton Oh Dis 3L

But isn't SO4 an ionic compound as well even though it has formal charge 0? Or is it a ionic molecule that is covalently bonded?

Hamilton Oh Dis 3L

Why does the BF3 form a bond with a F- anion to become BF4 given that BF4 does not have a formal charge of 0?

Hamilton Oh Dis 3L

Which could be specified more accurately in a nanoparticle, the speed of an electron or the speed of a Li+ ion?

Hamilton Oh Dis 3L

The solution to question 2.1 in the textbook states that when the electron in a H atom transitions from the 1s-orbital to the 2p-orbital, the energy of the electron increases, as does the value of n. However, doesn't the energy of an electron approach zero as n increases? Does going from a negative ...

Hamilton Oh Dis 3L

Suppose a photon of a specific wavelength and frequency hits a H atom and caused it to transition from n=1 to n=3. Will the energy level drop straight from n=3 to n=1 and emit a photon, or will it stop mid-way at n=2 and emit a photon from the n=3 to n=2 transition?

CHEMISTRY COMMUNITY

Search found 30 matches

CO2

cis/trans

AX2E2

EQUATIONS pt 2

EQUATIONS

Molar entropy

Winter 2012 Midterm

work

Endothermic or exothermic

bond enthalpies

Boltzman eq

Reversible vs. Irreversible reaction

Henderson-Hasselbalch equation

SigFigs

SigFigs 12.57

strength of acids/bases

acetic acid vs trichloroacetic acid vs formic acid

Delocalizing charge of acid

SigFigs

[Co(CN)5(OH2)2]2-

Heteronuclear bonds

LiH vs HCl

HSO3-

AX3E2 structure

BeCl2 LEWIS STRUCTURE

Re: Boron trifluoride --> Tetrafluoroborate

Boron trifluoride --> Tetrafluoroborate

Comparing accuracies of the uncertainty in velocity

energy of electron in H-Atom

Energy Levels