CHEMISTRY COMMUNITY

Niveda_Tennety_1H

When do you use PdeltaV=deltanRT?

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How do you know that the CH2s in the boat configuration are closer together than those in the chair configuration? Then, due to fewer electron-electron repulsions, the chair configuration would have a lower potential energy and thus a higher stability right?

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For an electrophilic addition reaction mechanism of a compound with a double bond and HBr, does the carbon to which the H is added matter?

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Question 2A:

For the reaction 2CO(g)+O2(g)-->2CO2(g)
Without doing calculations, predict the sign of Change in entropy of the system.

How do we know that the change in entropy of the system is less than 0?

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Alkene joke

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Alkane joke

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When do you use endergonic and exergonic as opposed to exothermic and endothermic?

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For Q8B on the Winter 2013 Midterm, how is n 8? Where are the electrons being transferred in this equation?: Fe(s) (+) 2Ce4+ -->Fe2+ (+) 2Ce3+

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For question 9.63, the answer key says that "Compounds with a positive free energy of formation are unstable with respect to the elements." Are spontaneous reaction not unstable (Gibbs free energy for spontaneous reactions is negative, right)?

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Someone studying atoms is really just a bunch of atoms trying to understand themselves.

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For calculations involving (Delta S) = nRln(V2/V1), when can you assume that there is only 1 mol of the substance?

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In a molecular orbital diagram for a heteronuclear diatomic molecule that has 1 element from groups 13-15 and another element from groups 16-18, what template must be used? Should the pi 2p orbitals have a lower energy than the sigma 2p or is it vice versa? For example, [BO]-

Niveda_Tennety_1H

Does this shortcut to determine the acidity/basicity of salts always work?

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How should you structure a molecular orbital diagram for CO? What is the order of the sigma 2p and pi 2p orbitals?

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Because Na only has a 1+ charge, it cannot be considered an acidic cation right? So, ClO is the only ion reacting with water? Is it the only component in determining the pH of this salt solution? ClO- + H2O-<-> HClO + OH- Because ClO- is the conjugate base of a weak acid, NaClO is a basic salt right...

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Equilibrium constant. Que?

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For the molecular orbital of CN- does it matter where the extra electron goes? Or, should it go in one of the 2p orbitals of C or N?

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Is formal charge in any way related to polarity?

Niveda_Tennety_1H

Is it usually more efficient to use the Rydberg equation in these types of problems where frequency and an initial/final energy level are provided? In other words, when would you use E=-hR/n^2 over the Rydberg Equation?

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As work function increases does the ionization energy increase? So do metals with larger atomic radii have lower work functions?

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In photoelectric experiments, typically what part of the electromagnetic spectrum is the incoming light? I understand that UV light is typically used, but what is the minimum frequency needed to eject electrons, albeit poorly?

CHEMISTRY COMMUNITY

Search found 21 matches

PdeltaV=deltanRT

Stability of chair and boat isomers

Electrophilic Addition

Final Exam Winter 2014 Question 2A

Re: Post All Chemistry Jokes Here

Re: Post All Chemistry Jokes Here

Describing reactions

Winter 2013 Midterm 8B

Gibbs Free Energy and Stability

Re: Post All Chemistry Jokes Here

Change in Entropy [ENDORSED]

Heteronuclear Diatomic Molecules

Shortcut for determining acidity/basicity of salts

Molecular orbital theory of diatomic molecules

classifying acidity/basicity of NaClO

Re: Post All Chemistry Jokes Here

Molecular Orbital CN- [ENDORSED]

Formal Charge

Rydberg Equation [ENDORSED]

Re: Minimum frequency needed to eject electrons

Minimum frequency needed to eject electrons