Search found 14 matches
- Fri Mar 17, 2017 4:20 pm
- Forum: *Alkanes
- Topic: ORDER OF SUBSTITUENTS
- Replies: 2
- Views: 1431
Re: ORDER OF SUBSTITUENTS
The methyl would be placed before the methylethyl because methyl occurs first alphabetically.
Re: 1.18
The bicycloalkane is beyond the scope of what we need to know for Chem 14B, we shouldn't have to worry about naming it until 14C. Also, problem 1.18 isn't one of the listed problems that is recommended, so in terms of preparation for this course you should be fine without it.
- Sun Mar 05, 2017 2:13 am
- Forum: Administrative Questions and Class Announcements
- Topic: Quiz 3 Winter 2017
- Replies: 183
- Views: 28981
Re: Quiz 3 Winter 2017
Can someone help me with #3 I don't understand how both of them are nucleophiles? Are you referring to #6? Nucleophiles are species rich in electrons. For the benzene ring, this electron richness comes from its double bonds. For CH_{3}OCH_{3} the oxygen in the center of the compound can only be att...
- Wed Mar 01, 2017 11:36 pm
- Forum: *Alkanes
- Topic: Common Names
- Replies: 2
- Views: 559
Re: Common Names
They're just for reference, on an exam it'll either explicitly state to give the IUPAC name or it'll simply say to name the compound (in which case either the IUPAC name or common name is acceptable).
- Tue Feb 21, 2017 9:27 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Quiz 2 Winter 2017
- Replies: 160
- Views: 24139
Re: Quiz 2 Winter 2017
Is there a reason why number six's answer has three significant figures despite the given concentration 0.35M having two significant figures? Do we not bother with sig figs when ln is involved?
- Mon Feb 20, 2017 2:10 am
- Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
- Topic: Energy Extensive or Intensive?
- Replies: 2
- Views: 24423
Re: Energy Extensive or Intensive?
Adding on, some examples of intensive properties include specific heat capacity and standard reduction potential, whereas examples of extensive properties include entropy, enthalpy, and Gibbs free energy. Standard reduction potential E^{\circ} being an intensive property is the reason why for redox ...
- Fri Feb 10, 2017 1:41 am
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Units When Using Bond Enthalpies
- Replies: 1
- Views: 459
Re: Units When Using Bond Enthalpies
For \Delta H{_{rxn}}^{^{\circ}}^ it's fine for your final answer to be in either kj or kj/mol. Here the mol in kj/mol is only referring to the amount of heat being absorbed or released per mole of reaction . In other words, if the reaction is being carried out with its current stoichiometric coeffic...
- Thu Feb 09, 2017 11:16 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Writing Cell Diagram?
- Replies: 2
- Views: 606
Re: Writing Cell Diagram?
It's convention for the anode to be on the left and the cathode to be on the right, Anode||Cathode. If the cell diagram is given in a problem, or it asks you to construct a cell diagram, then you can assume that the diagram will follow this convention. This is particularly important when given a cel...
- Thu Feb 09, 2017 10:59 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: 14.11
- Replies: 2
- Views: 577
Re: 14.11
To add to that, when asked to build a cell diagram, we put inert electrodes such as Pt(s) at both ends whenever both the oxidation and reduction species are in the same solution (for example, when both are aqueous).
- Wed Feb 01, 2017 11:01 am
- Forum: Administrative Questions and Class Announcements
- Topic: Quiz 1 Preparation Answers
- Replies: 130
- Views: 25167
Re: Quiz 1 Preparation Answers
Hi, I had some questions about sig figs.
For #1, shouldn't the answer be 310.J instead of 310J since both 254J and 564J have three significant figures?
For #10, shouldn't the answer be 0.7J/K instead of 0.683J/K since both 200J and 20°C have one significant figure?
For #1, shouldn't the answer be 310.J instead of 310J since both 254J and 564J have three significant figures?
For #10, shouldn't the answer be 0.7J/K instead of 0.683J/K since both 200J and 20°C have one significant figure?
- Sun Jan 29, 2017 11:44 pm
- Forum: Calculating Work of Expansion
- Topic: Ideal Gases Formula Pt. 2
- Replies: 2
- Views: 578
Re: Ideal Gases Formula Pt. 2
If you're looking for a problem that incorporates any of U=3/2nRT; Cv=3/2R; and/or Cp=5/2R, take a look at problem 8.31 in Chapter 8!
- Sun Jan 22, 2017 10:08 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Enthalpy of H+ protons
- Replies: 2
- Views: 881
Re: Enthalpy of H+ protons
Could it be because the standard enthalpy of formation of an element in its most stable form is zero, and H+ is in its most stable form because it's only made up of one element?
- Sun Jan 22, 2017 9:58 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Ch. 8 Number 31
- Replies: 2
- Views: 2048
Re: Ch. 8 Number 31
There is a table with those values on page 281 in the textbook!
- Sun Jan 15, 2017 2:45 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 2983228
Re: Post All Chemistry Jokes Here
Why was the non-metal kicked out of the orchestra?
It was a poor conductor!
It was a poor conductor!