Search found 11 matches

by Betty Tesfaye 2G
Thu Mar 10, 2016 10:20 pm
Forum: Balancing Redox Reactions
Topic: Winter 2011 Final Q3A
Replies: 1
Views: 302

Re: Winter 2011 Final Q3A

I believe its because the questions asks for a basic reaction. However, you can always balance the reaction using H+ in the beginning and convert the new equation to OH- later.
by Betty Tesfaye 2G
Thu Mar 03, 2016 2:45 pm
Forum: *Haloalkanes
Topic: Order of writing halogens
Replies: 3
Views: 1034

Order of writing halogens

If you have more than one halogen attached to a carbon ring or chain how do you know which to give the lowest number and then how would you order that in the name?
by Betty Tesfaye 2G
Wed Feb 24, 2016 4:07 pm
Forum: *Cycloalkanes
Topic: Counting Carbons
Replies: 2
Views: 496

Re: Counting Carbons

It really doesn't matter when it comes to rings as to where you start. But if you have substituents on the ring, you want to count in any way that gives you the smallest numbers.
by Betty Tesfaye 2G
Tue Feb 16, 2016 8:13 pm
Forum: Second Order Reactions
Topic: 3rd order?
Replies: 7
Views: 805

Re: 3rd order?

1/M^2s
by Betty Tesfaye 2G
Thu Feb 11, 2016 2:24 pm
Forum: Method of Initial Rates (To Determine n and k)
Topic: Half Life Question
Replies: 1
Views: 470

Half Life Question

Is half life always half the original concentration or does it change under different circumstances?
by Betty Tesfaye 2G
Sun Feb 07, 2016 11:44 am
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Heat Capacity
Replies: 1
Views: 323

Re: Heat Capacity

You would add the vessel's CdeltaT (mass doesn't matter) to the water because it's part of your surroundings (the vessel it holding the water you place your object into). So it would be qobject=-(qwater+qvessel).
by Betty Tesfaye 2G
Mon Feb 01, 2016 5:07 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: ∆G° at Equilibrium
Replies: 1
Views: 247

Re: ∆G° at Equilibrium

Well, at equilibrium the concentrations of the products and reactants are equal, making K=1. When you look at the equation deltaG*= -RTlnK then you see you will have an ln(1), which equals zero and multiplies with the other constants making deltaG*=0.
by Betty Tesfaye 2G
Mon Feb 01, 2016 4:55 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Cathode and Anode Half Recations
Replies: 2
Views: 356

Re: Cathode and Anode Half Recations

The anode would be the reaction that is being oxidized (loses electrons) and the cathode would be the reaction that is being reduced (gains electrons).
by Betty Tesfaye 2G
Mon Jan 25, 2016 11:05 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Calculating final temperature of a system
Replies: 3
Views: 553

Re: Calculating final temperature of a system

Not necessarily, I've calculated T final correctly using Celsius just make sure your heat capacity is in the same units.
by Betty Tesfaye 2G
Thu Jan 14, 2016 5:11 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Question on 8.28
Replies: 1
Views: 275

Question on 8.28

So in the first step the gas is cooled at a constant volume at 1.19atm. And in discussion, my TA said that work is equal to zero, but Im still confused as to why. Any explanations?
by Betty Tesfaye 2G
Wed Jan 06, 2016 7:11 pm
Forum: Phase Changes & Related Calculations
Topic: Course Reader Help
Replies: 2
Views: 439

Re: Course Reader Help

Well the first thing is that the values you see under that equation do not correspond to the number of molecules, they represent the energy released or required to either form or break the bond respectively. So in this case, CH2=CH2 must break a bond between the two carbons (C=C) and H-Br also must ...

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