Search found 25 matches

by Bryce Bentley 1l
Fri Mar 11, 2016 4:52 pm
Forum: *Cyclopropanes and Cyclobutanes
Topic: bond angle strain
Replies: 1
Views: 774

Re: bond angle strain

Bond angle strain occurs when a molecule's bonds are not in their ideal positions. For a carbon atom bonded with four other atoms, the ideal shape tetrahedral with 109 degree angles. If the bonds are not at that exact degree, then there's bond angle strain. Cyclopropane, cyclobutane, cyclopentane, e...
by Bryce Bentley 1l
Fri Mar 11, 2016 4:39 pm
Forum: *Cyclopropanes and Cyclobutanes
Topic: Conformations [ENDORSED]
Replies: 4
Views: 1161

Re: Conformations [ENDORSED]

cyclopropane has only one conformation; it is only found with all of its carbon atoms in the same plane. That's why it is a very unstable molecule
by Bryce Bentley 1l
Fri Mar 04, 2016 1:21 am
Forum: *Organic Reaction Mechanisms in General
Topic: Nucleophilic Substitution and Electrophilic Addition
Replies: 1
Views: 359

Re: Nucleophilic Substitution and Electrophilic Addition

Nucleophilic substitution is one step with only one transition state. Electrophillic addition is 2 steps with two transitional states
by Bryce Bentley 1l
Thu Feb 25, 2016 1:52 am
Forum: *Alkynes
Topic: Homework 1.5c
Replies: 2
Views: 866

Re: Homework 1.5c

The formula for alkynes is C(n)H(2n-2) n is the number of carbon atoms. So for propyne it is C(3)H(2*3-2) which comes out to C3H4.
by Bryce Bentley 1l
Fri Feb 19, 2016 9:36 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Arrhenius Eq. and gas state reactions
Replies: 1
Views: 353

Re: Arrhenius Eq. and gas state reactions

Yes the equation would work in those cases. Remember even though R is called the gas constant, it is still used in equations regardless of the phase involved(like the equation deltaG=-RTlnK)
by Bryce Bentley 1l
Fri Feb 12, 2016 4:01 pm
Forum: General Rate Laws
Topic: Slow step vs fast step
Replies: 1
Views: 353

Slow step vs fast step

In a multi-step equation, how can we tell which step is the slow one step and which are the fast ones? Is it usually given or is there some way to figure it out on our own?
by Bryce Bentley 1l
Mon Feb 01, 2016 12:57 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8242
Views: 1437654

Re: Chemistry Jokes

GrantSugimura_1B wrote:I have a ton of chemistry jokes, I'm just afraid they won't get a good reaction.


As long as the reaction is spontaneous you are good! No energy will be needed to make people laugh!
by Bryce Bentley 1l
Mon Feb 01, 2016 11:56 am
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Isothermal conditions and delta U=0
Replies: 2
Views: 577

Re: Isothermal conditions and delta U=0

Hey sara! Isothermal means that no heat can be transferred in or out of a system. The system cannot lose or gain energy from heat transfer. The heat within a system that is isothemic can be converted to or from work. This makes q=-w which makes q-w=O. The total energy in the system does not change, ...
by Bryce Bentley 1l
Mon Feb 01, 2016 11:41 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8242
Views: 1437654

Re: Chemistry Jokes

A man accidentally dropped his tooth in a solution of HCl. The man was so shocked that it dissolved so quickly that he just had to find the Molar concentration!!
by Bryce Bentley 1l
Sun Jan 31, 2016 8:10 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8242
Views: 1437654

Re: Chemistry Jokes

I hope the electrochemistry portion of the midterm won't Reduce my mood!
by Bryce Bentley 1l
Sun Jan 31, 2016 8:02 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8242
Views: 1437654

Re: Chemistry Jokes

How much free energy does the average phone have when its battery is full?

None! Electricity doesn't pay for itself!
by Bryce Bentley 1l
Sun Jan 31, 2016 7:56 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8242
Views: 1437654

Re: Chemistry Jokes

Thermodynamic pickline:
You must have a low heat capacity, because it doesn't take much joules (jewels) to make you hot!!
by Bryce Bentley 1l
Mon Jan 25, 2016 12:04 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Residual Entropy
Replies: 1
Views: 442

Re: Residual Entropy

Residual entropy is the entropy when a perfect crystal is close to absolute 0. Since theoretically the temperature would have no effect on the substance's entropy, the residual entropy is based off of the molecules of the substance.
by Bryce Bentley 1l
Mon Jan 18, 2016 8:05 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Heat Transfer Equations
Replies: 2
Views: 491

Re: Heat Transfer Equations

The equation Q=C x Delta T is used when we are given the total heat capacity for substance. this equation, Q=n (or mols)x C x Delta T, is used when we only know the specific (or molar) heat capacity of a substance and want to find the total amount of heat released or absorbed. Always pay attention t...
by Bryce Bentley 1l
Mon Jan 11, 2016 10:15 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Heat Capacity of Calorimeter
Replies: 1
Views: 294

Re: Heat Capacity of Calorimeter

The mass is only important when you want to find the specific heat capacity which gives you the C value per gram. For a calorimeter you typically don't care about the specific heat capacity, just the heat capacity overall so you can measure the total amount of heat a reaction gives off.
by Bryce Bentley 1l
Thu Jan 07, 2016 1:14 am
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Enthalpies of exothermic rxns
Replies: 2
Views: 495

Re: Enthalpies of exothermic rxns

Yes, the value for the Enthalpy of a reaction has the opposite sign of its reverse reaction but the same absolute value.
by Bryce Bentley 1l
Fri Dec 04, 2015 3:34 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Q and K
Replies: 2
Views: 414

Re: Q and K

"Q" is the reaction quotient at a specific time during a reaction. If Q does not equal K then the reaction has not reached equilibrium yet. If Q is less than K, then the reaction will favor the products and move to the right. If Q is greater than K, then the reaction will favor the reactan...
by Bryce Bentley 1l
Sun Nov 29, 2015 11:13 pm
Forum: Lewis Acids & Bases
Topic: (am) state
Replies: 1
Views: 390

Re: (am) state

(am) means that the substance was dissolved in ammonia
by Bryce Bentley 1l
Tue Nov 10, 2015 10:45 pm
Forum: Naming
Topic: names for anionic ligands
Replies: 2
Views: 591

names for anionic ligands

For the names of anionic ligands, do we use the new IUPAC name convention or the "name" thats listed under "names*"in the course reader?
by Bryce Bentley 1l
Sat Nov 07, 2015 2:56 pm
Forum: Photoelectric Effect
Topic: when to use photoelectric effect or debroglie?
Replies: 3
Views: 1096

Re: when to use photoelectric effect or debroglie?

I'm pretty sure the De brogolie equation had to be to show your understanding of the equation and its use. Also I'm not sure if your way worked but your method should only be using for EM radiation. The debroglie is used to tell how noticeable the wavelength characteristics of a moving object is, wh...
by Bryce Bentley 1l
Fri Oct 30, 2015 10:47 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Xenon Trioxide
Replies: 2
Views: 1168

Re: Xenon Trioxide

You use double bonds so that all of the atoms fulfill their octet. O needs two more to fill octet so it shares two of its own while Xe does the same. That also gives the O zero formal charge which makes the molecule more stable. So when determining bonds, take into account how many electrons are nee...
by Bryce Bentley 1l
Sat Oct 24, 2015 3:42 pm
Forum: Lewis Structures
Topic: carbon bonding with oxygen
Replies: 1
Views: 382

carbon bonding with oxygen

In most molecules, carbon forms a double bond with oxygen to form a stable molecule with less energy. In the case of Carbon Monoxide it forms a triple bond but that gives oxygen a formal charge of +1 and carbon a charge of -1. If it was a double bond then there would be 0 formal charge for both. So ...
by Bryce Bentley 1l
Sat Oct 17, 2015 1:51 pm
Forum: Ionic & Covalent Bonds
Topic: Ground State Electron Configuration with f-block
Replies: 2
Views: 1902

Re: Ground State Electron Configuration with f-block

Look at the element Lanthanum and its atomic number, then look at Hafnium which is right beside it. Notice that the atomic numbers of the two are far apart from each other in value. That's because in between the two elements there are 14 more elements which are in the f-block. Look at a periodic tab...
by Bryce Bentley 1l
Sat Oct 10, 2015 1:55 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Manganese Cation
Replies: 1
Views: 377

Re: Manganese Cation

Yes because the electrons in the 4s orbital always get removed before the ones in the 3d orbital. If Zinc lost one electron then it would be isoelectronic with copper.
by Bryce Bentley 1l
Sat Oct 03, 2015 1:52 am
Forum: Properties of Light
Topic: Manipulating the Rydberg Equation
Replies: 1
Views: 574

Re: Manipulating the Rydberg Equation

My TA said that we won't have to worry about learning any equations like that for the other elements because they are far more complex. And I believe the Rydberg equation that we were taught works for hydrogen atoms because they have only one electron that we have to worry about. If you remove one e...

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