CHEMISTRY COMMUNITY

Hirmand_Sarafian_2N

The double bond takes priority and you need to move across it so you have to start at 1 for the double bond and move left

Hirmand_Sarafian_2N

When drawing organic reaction mechanisms using the curved lines method, should we include (draw in) the transition states also?

Hirmand_Sarafian_2N

Can someone explain to me what is the steric contributon to standard enthalpies of activation? Also will this be on the quiz?

Hirmand_Sarafian_2N

Just wondering, is there any curve applied to the midterm? Thanks

Hirmand_Sarafian_2N

Can somebody explain to me why 10 on the quiz 2 prep is false?

Hirmand_Sarafian_2N

Can someone explain to me what the criteria is to use inert electrodes, like Platinum in most cases?

Hirmand_Sarafian_2N

How do you determine which molecule has more entropy? For example, CO or N2 in Quiz 1

Hirmand_Sarafian_2N

For the deltaU=q+w equation, is work performed on the system positive or is work performed by the system positive? Also, just to clarify, heat absorbed by a system is positive q correct?

Hirmand_Sarafian_2N

On 9, I understand that (q and w) and w are not correct, but how do we determine which of the other 3 answers are nonzero?

Hirmand_Sarafian_2N

On 8, since Delta H is positive and deltaS is negative, will the reaction never be spontaneous since deltaG can never be negative?

Hirmand_Sarafian_2N

It depends on what parameters are kept constant

Hirmand_Sarafian_2N

In today's example of the work performed during gas Expansion, how does the gas expand if the internal energy is equal to zero since heat and work are equal and opposite?

Hirmand_Sarafian_2N

You multiply the standard enthalpies of formation of each product by the number of moles needed and all the values together; you then do the same for the reactants. Finally, subtract the reactants' value from the products' value to get the standard reaction enthalpy of the whole reaction in kJ.

Hirmand_Sarafian_2N

It's not an h. It's an n and it means moles of whatever you are finding the concentration of.

Hirmand_Sarafian_2N

"Last night, a hypnotist convinced me that I was a soft, malleable metal with an atomic number of 82... I am easily lead."

Hirmand_Sarafian_2N

Strong acids produce more protons than weak acids do in a solution; they show nearly 100% ionization. Likewise, strong bases are entirely ionized in water unlike weak bases which are only partially ionized.

Hirmand_Sarafian_2N

Are Kc and Kp equal in value? If not, how do you know when to use Kp and when to use Kc?

Hirmand_Sarafian_2N

If you bond an atom with filled or partially filled d-orbitals in its valence with one without the d-orbitals filled at all, how would the molecular orbital diagram change if at all?

Hirmand_Sarafian_2N

Yeah, today he told us that they midterm will cover everything up to the end of hybridization, so molecular orbital theory shouldn't be on there and neither will the antibonding and bonding molecular orbitals.

Hirmand_Sarafian_2N

Boron and aluminum are exceptions to the octet rule since they can have less than 8 valence electrons like in boron trifluoride; however, these compounds tend to take part in Lewis acid-base reactions where a coordinate covalent bond is formed giving these elements the full octet like when boron tri...

Hirmand_Sarafian_2N

You use the amount of significant figures in the constant you used, so you just use whatever amount of sig figs that the rydberg constant has on our chart of values.

Hirmand_Sarafian_2N

Once light has the frequency capable to overcome the threshold energy and remove the electron leaving excess kinetic energy that moves the electron at a particular velocity, does increasing the intensity of the light have an effect on the kinetic energy of the increased amount of removed electrons o...

Hirmand_Sarafian_2N

Initially, light was only thought of as a wave, so in this experiment, scientists attempted to use high wavelength, low frequency light to remove the electrons off the metal surface. When electrons were not first removed, they believed that simply raising the intensity of the light, its amplitude, w...

Hirmand_Sarafian_2N

In chemistry, when rounding our answers, do we round up if equal to or greater than 0.5 over the last digit and down if less than 0.5 over the last digit, or do we simply round to the nearest even digit?

CHEMISTRY COMMUNITY

Search found 24 matches

Re: Where to start counting Winter 2013 final 6A

Inclusion of Transition States

Steric Contriubtion to Standard Enthalpies of Activation

Re: Midterm Winter 2017

Re: Quiz 2 Winter 2017

Inert Electrodes

Molecular Entropy

Positive and Negative

Quiz Prep 1 #9

Quiz Prep 1 #8

Re: Changing Pressure

Gas Expansion when Internal Energy is 0 [ENDORSED]

Re: Hess's Law

Re: con = h/v question

Re: Post All Chemistry Jokes Here

Re: Strong acids and Bases [ENDORSED]

Kc or Kp

MO diagram for D-orbital valence electrons

Re: M.O.T. on midterm clarification

Re: Group 13 Elements [ENDORSED]

Re: Significant Figures

Intensity and Kinetic Energy

Re: Photoelectric Effect

Re: Significant figure rules