Search found 14 matches

by ssoroush 2B
Fri Mar 17, 2017 9:43 am
Forum: *Alkanes and Substituted Alkanes (Staggered, Eclipsed, Gauche, Anti, Newman Projections)
Topic: Specific Bond Angles
Replies: 2
Views: 256

Re: Specific Bond Angles

You need to know the bond angles for the eclipsed, staggered and gauche conformations.
by ssoroush 2B
Fri Mar 17, 2017 9:42 am
Forum: *Electrophilic Addition
Topic: Electrophilic Addition
Replies: 2
Views: 596

Re: Electrophilic Addition

No it doesn't. As long as the hydrogen bonds to a carbon before the bromine atom.
by ssoroush 2B
Fri Mar 17, 2017 9:42 am
Forum: *Alkenes
Topic: Alkenes as functional groups??
Replies: 1
Views: 572

Re: Alkenes as functional groups??

Yes the double and triple bonds are considered functional groups.
by ssoroush 2B
Fri Mar 03, 2017 9:51 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7581
Views: 1013814

Re: Post All Chemistry Jokes Here

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by ssoroush 2B
Fri Mar 03, 2017 9:46 am
Forum: *Cycloalkenes
Topic: Geometric Isomers
Replies: 2
Views: 591

Re: Geometric Isomers

Geometric isomers have the same molecular formula but differ in the arrangement of groups with respect to double bonds or rings (eg. trans and cis isomers). Constitutional isomers have the same molecular formula but differ in structure.
by ssoroush 2B
Fri Mar 03, 2017 9:41 am
Forum: *Alkanes
Topic: Naming/Numbering Compounds
Replies: 1
Views: 258

Re: Naming/Numbering Compounds

The carbonyl functional group gets priority.
by ssoroush 2B
Thu Feb 16, 2017 6:50 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7581
Views: 1013814

Re: Post All Chemistry Jokes Here

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by ssoroush 2B
Thu Feb 16, 2017 6:46 pm
Forum: General Rate Laws
Topic: General Rate Question
Replies: 2
Views: 276

Re: General Rate Question

You should answer using the units that are used in the question unless told otherwise.
by ssoroush 2B
Thu Feb 09, 2017 2:28 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7581
Views: 1013814

Re: Post All Chemistry Jokes Here

Image
by ssoroush 2B
Thu Feb 09, 2017 2:23 pm
Forum: Balancing Redox Reactions
Topic: Balancing Half Reactions for Basic Solution
Replies: 1
Views: 213

Re: Balancing Half Reactions for Basic Solution

You use OH- when you have H+ ions that you need to get rid of. If a reaction is occurring in an acidic solution then you would have H+ ions in the solution. But if the reaction is in a basic solution, you need to cancel these H+ ions by adding OH- ions.
by ssoroush 2B
Thu Feb 02, 2017 7:20 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Relationship between S & T
Replies: 2
Views: 295

Re: Relationship between S & T

It's because adding more energy to the system excites the molecules and there is more disorder and chaos, which is what entropy is measuring.
by ssoroush 2B
Thu Jan 26, 2017 9:05 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Standard State Conditions
Replies: 1
Views: 267

Re: Standard State Conditions

Use 298 K. However it doesn't really matter which one you use since it won't have a huge effect on the final answer. Also, I'm pretty sure you can use either value as long as you show your work.
by ssoroush 2B
Tue Jan 17, 2017 9:45 pm
Forum: Phase Changes & Related Calculations
Topic: Calculating Enthalpy [ENDORSED]
Replies: 4
Views: 464

Re: Calculating Enthalpy [ENDORSED]

Yes, you have to divide by the number of moles to get the standard enthalpy of formation per mole.
by ssoroush 2B
Thu Jan 12, 2017 10:16 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Bond Enthalpies
Replies: 7
Views: 447

Re: Bond Enthalpies

Draw the lewis structures for all the products and reactants and compare the bonds. If a bond exists in one of the reactants but doesn't in the products then that bond is broken and if a bond does not exist in one of the reactants but exists in the products then that bond is formed. It's basically a...

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