Search found 11 matches

by Elizabeth Hoang 2C
Sat Mar 05, 2016 4:47 pm
Forum: *Ethers
Topic: number of shared bonds in ethers
Replies: 1
Views: 361

number of shared bonds in ethers

For an ether function group, is the oxygen allowed to have double or triple bonds with one of the two carbons? Or is it only allowed to have single bonds with the carbons?
Thanks!
by Elizabeth Hoang 2C
Mon Feb 29, 2016 12:39 am
Forum: *Alkanes
Topic: noncyclic vs cyclic
Replies: 1
Views: 2984

noncyclic vs cyclic

What's the difference between noncyclic alkane and cyclic alkane?
by Elizabeth Hoang 2C
Fri Feb 26, 2016 10:30 pm
Forum: *Alkenes
Topic: Homework 1.12 (c)
Replies: 1
Views: 310

Re: Homework 1.12 (c)

I believe you are correct! The same should apply for triple bonds where the numbering on carbons for triple bonds are prioritized over that of the substituent(s).
by Elizabeth Hoang 2C
Fri Feb 26, 2016 10:26 pm
Forum: *Alkenes
Topic: Naming Alkenes
Replies: 2
Views: 443

Re: Naming Alkenes

Hi Gina! Naming straight chain alkanes is similar for alkenes, except you find the longest carbon chain that contains the double bond between the two carbons and change the suffix to -ene. Hope the following video helps you for tips and tricks! https://www.khanacademy.org/science/organic-chemistry/a...
by Elizabeth Hoang 2C
Wed Feb 17, 2016 1:51 am
Forum: General Rate Laws
Topic: Half-order
Replies: 1
Views: 310

Half-order

Is it possible to have a half-order (with respect to a specific concentration) in a rate law? Or are only whole numbers possible for reaction orders?
by Elizabeth Hoang 2C
Thu Feb 11, 2016 12:30 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Molecularity
Replies: 2
Views: 431

Re: Molecularity

Molecularity refers to the the number of molecules that participate in the rate law. Therefore, you can determine the molecularity from the elementary step/ rate law. For example, the rate law rate=k[A] is unimolecular while the rate law rate=k[A][B][C] is termolecular.
by Elizabeth Hoang 2C
Wed Feb 03, 2016 3:59 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: 14.17 textbook problem
Replies: 2
Views: 418

14.17 textbook problem

For 14.17, we are asked to write the balanced half-reactions for the redox reaction of an acidified solution of potassium permanganate and iron(II) chloride. How do we know which half reaction to use since we are given 4 different types (i.e. K+, MnO4-, Fe2+, Cl-)?
by Elizabeth Hoang 2C
Wed Jan 27, 2016 10:01 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Finding free energy (G)
Replies: 1
Views: 267

Finding free energy (G)

When finding Gibbs free energy (G) of a gas at pressure P, we need to use the equation listed on page 42 in the course reader: G= G(naught) + RTln(P/P(naught)). Why do we need to add the free energy of the gas at 1 atm and the free energy difference if the reaction is occurring at one specific press...
by Elizabeth Hoang 2C
Wed Jan 20, 2016 7:27 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Question 8.53 Units for internal energy
Replies: 1
Views: 320

Re: Question 8.53 Units for internal energy

Hey Christine! The units for 53b. is expressed as kJ/mol since the question asks to find the enthalpy for one mole of carbon monoxide gas. The result/ answer is then expressed as kJ/mol. However, this is not always the case depending on the coefficients of the balanced reaction. Take for example the...
by Elizabeth Hoang 2C
Sat Jan 16, 2016 11:01 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Heat Capacity
Replies: 2
Views: 445

Re: Heat Capacity

I believe that if you are given mass or the number of moles in a problem, you should use the specific heat capacity (J x K^-1 x g^-1). Deciding which of the two equations to use (q = (heat capacity)(delta T) or q = (moles or grams)(specific heat capacity)(delta T)) can also help you determine which ...
by Elizabeth Hoang 2C
Fri Jan 08, 2016 4:07 pm
Forum: Phase Changes & Related Calculations
Topic: Heat Capacity
Replies: 1
Views: 278

Re: Heat Capacity

While intensive properties are helpful in identifying unknown samples, extensive properties are actually quite helpful for describing a sample. Because their dependence on mass sets them apart from each other, I think that both extensive and intensive properties are necessary labels for whenever the...

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