Search found 10 matches

by rachelmackenzie3H
Wed Mar 15, 2017 10:39 pm
Forum: *Cycloalkenes
Topic: Phenol groups
Replies: 2
Views: 675

Phenol groups

Are phenol groups fair game for the exam?
by rachelmackenzie3H
Tue Mar 07, 2017 7:51 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Relationship between activation energy and temperature
Replies: 1
Views: 737

Relationship between activation energy and temperature

If the activation energy for a reaction is independent of temperature, how come we have the equation Ea= delta H + RT? Wouldn't an increase in temp cause an increase in the Ea?
by rachelmackenzie3H
Sun Mar 05, 2017 10:34 pm
Forum: *Complex Reaction Coordinate Diagrams
Topic: Reaction Profile Y-axis
Replies: 1
Views: 598

Reaction Profile Y-axis

For the y-axis of a reaction profile graph, is the label supposed to be delta G or just G?
by rachelmackenzie3H
Sun Feb 26, 2017 6:26 pm
Forum: *Electrophilic Addition
Topic: Cholesterol example on page 84 of CR
Replies: 2
Views: 363

Cholesterol example on page 84 of CR

The image of cholesterol on page 84 of the CR shows that most of the carbons in the molecule only have two or three bonds as opposed to four. Why is that?
by rachelmackenzie3H
Sun Feb 19, 2017 9:30 pm
Forum: Method of Initial Rates (To Determine n and k)
Topic: Unique Rate of A Reaction
Replies: 2
Views: 349

Unique Rate of A Reaction

I see that 15.3 asks about the rate of the reaction in respect to different reactants. However, what do they mean when they refer to the unique rate of the reaction?
by rachelmackenzie3H
Thu Feb 09, 2017 2:39 pm
Forum: Balancing Redox Reactions
Topic: Basic Solution Redox Reaction
Replies: 1
Views: 332

Basic Solution Redox Reaction

Are we expected to know basic solution redox reactions for the exam? Or will we only have to know how to deal with acidic solutions?
by rachelmackenzie3H
Mon Jan 30, 2017 8:21 am
Forum: General Science Questions
Topic: Sig Figs with Logs
Replies: 2
Views: 1151

Sig Figs with Logs

Can anyone give a clear explanation of how many sig figs to use with logarithms? I am kind of confused by the information in the course reader.
by rachelmackenzie3H
Sat Jan 28, 2017 9:53 am
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Pressure's effect on Entropy
Replies: 1
Views: 685

Pressure's effect on Entropy

How does a change in pressure affect the entropy of a gas? Does it just depend on how the pressure change affects the volume and/or temperature?
by rachelmackenzie3H
Sun Jan 22, 2017 8:08 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: The Value of R
Replies: 2
Views: 372

Re: The Value of R

Basically just look at the units that you are are trying to solve for. For example, since this unit we are focusing a lot on energy, you will be using the R=8.314J/K*mol for a majority of the calculations because this value includes Joules. However, the other values of R are more helpful in using th...
by rachelmackenzie3H
Sun Jan 15, 2017 1:43 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Reversible vs. Irreversible Reactions
Replies: 2
Views: 287

Reversible vs. Irreversible Reactions

Can anyone give a good explanation as to why work done in a reversible reaction is always more than the work done in an irreversible reaction?

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