Search found 11 matches

by annchen0628
Fri Mar 11, 2016 2:47 pm
Forum: *Nucleophilic Substitution
Topic: 2013 5C
Replies: 1
Views: 704

Re: 2013 5C

NH has a fully negative charge and OH is only partially negative. It's electronegative. NH therefore is more nucleophilic. It's SN2 because it's bimolecular. Two reactants are involved in the reaction. It's substitution because it's not "added" on to a double bond.
by annchen0628
Sat Mar 05, 2016 9:04 pm
Forum: *Alkanes and Substituted Alkanes (Staggered, Eclipsed, Gauche, Anti, Newman Projections)
Topic: Anti Conformation
Replies: 2
Views: 472

Re: Anti Conformation

If the two are 180 degrees apart, then it would be anti conformation.
by annchen0628
Sat Feb 27, 2016 5:21 pm
Forum: *Alkanes
Topic: quiz 3 prep 1 question 3
Replies: 1
Views: 154

quiz 3 prep 1 question 3

The answer key is 3, 4 dimethyl 2 pentene, but can we also put 3, 4 dimethylpent-2-ene?
by annchen0628
Sat Feb 27, 2016 5:15 pm
Forum: *Alkanes
Topic: Structural Isomers
Replies: 2
Views: 233

Re: Structural Isomers

Yes, they are still considered IUPAC names.
by annchen0628
Tue Feb 16, 2016 4:04 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Winter Quiz 2, Preparation 2 (w/answers) #11
Replies: 3
Views: 417

Re: Winter Quiz 2, Preparation 2 (w/answers) #11

You can use the equation Ink2/k1 = Ea/R (1/T1 - 1/T2) because they gave you k1, k2 and t1, t2, so all you need to do is just substitute the values and find Ea. Then you substitute T2 with 770K to find k2 while keeping k1 and t1 the same.

Hope that helps.
by annchen0628
Tue Feb 09, 2016 10:58 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: state function
Replies: 2
Views: 400

Re: state function

Not all. Temperature is a state function but it's intensive.
by annchen0628
Thu Feb 04, 2016 9:04 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Half equations
Replies: 1
Views: 312

Half equations

How do you write half equations for H+ + OH- --> H2O?
by annchen0628
Wed Feb 03, 2016 11:52 pm
Forum: Balancing Redox Reactions
Topic: Standard Reduction Potential
Replies: 1
Views: 249

Re: Standard Reduction Potential

You use hydrogen as a reference electrode under standard conditions to measure the ability/tendency for the species to be reduced.
by annchen0628
Mon Feb 01, 2016 11:37 pm
Forum: Third Law of Thermodynamics (For a Unique Ground State (W=1): S -> 0 as T -> 0) and Calculations Using Boltzmann Equation for Entropy
Topic: Microstate of SO2F2
Replies: 1
Views: 516

Microstate of SO2F2

How do you determine the number of microstate of SO2F2? Why is it 6 and not 4?
by annchen0628
Sat Jan 30, 2016 4:07 pm
Forum: Balancing Redox Reactions
Topic: Oxidation States
Replies: 8
Views: 1022

Re: Oxidation States

You can also work out most of the oxidation states from the equation given.
by annchen0628
Wed Jan 13, 2016 9:33 pm
Forum: Calculating Work of Expansion
Topic: Reversible and Irreversible
Replies: 3
Views: 582

Re: Reversible and Irreversible

For reversible processes, the pressure of internal and external is (close to) equal.

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