Search found 11 matches

by EmmaShahabi1L
Mon Mar 13, 2017 3:49 pm
Forum: *Constitutional and Geometric Isomers (cis, Z and trans, E)
Topic: When to Use Z and E?
Replies: 4
Views: 566

Re: When to Use Z and E?

Additionally, some times the classification of the Z and the E can be interchanged with a cis or a trans. So it's somewhat arbitrary, similar to the use of a common name instead of the IUPAC method.
by EmmaShahabi1L
Mon Mar 06, 2017 9:56 pm
Forum: *Organic Reaction Mechanisms in General
Topic: The pre-exponential factor in Arrhenius Equation
Replies: 1
Views: 397

The pre-exponential factor in Arrhenius Equation

Will we be given the pre-exponential factor in the Arrhenius Equation? Is this assumed to be constant or is it given individually for each problem?
by EmmaShahabi1L
Fri Mar 03, 2017 3:04 pm
Forum: *Alkanes
Topic: General list of special case common names
Replies: 1
Views: 329

General list of special case common names

Does anyone have a list of all the common named molecules that are used instead of IUPAC? Which ones do we definitely have to know?
by EmmaShahabi1L
Wed Feb 22, 2017 1:18 pm
Forum: Zero Order Reactions
Topic: Order Reactions [ENDORSED]
Replies: 4
Views: 463

Order Reactions [ENDORSED]

What is the significance of the order of a reaction? Is it solely to determine which equations to use? Or does it offer more insight
by EmmaShahabi1L
Wed Feb 15, 2017 10:20 pm
Forum: Balancing Redox Reactions
Topic: Balancing equations
Replies: 10
Views: 1072

Re: Balancing equations

If you're trying to estimate whether or not the reaction will be positive at the beginning, pay close attention to the initial E value of the cathode. Since the equation for the charge of a cell is cathode - anode if the cathode is a very high positive number, it's likely the total cell charge will ...
by EmmaShahabi1L
Tue Feb 07, 2017 11:37 pm
Forum: Kinetics vs. Thermodynamics Controlling a Reaction
Topic: Kinetics Equations
Replies: 1
Views: 388

Kinetics Equations

What are the essential equations we need to know for Kinetics?
by EmmaShahabi1L
Thu Feb 02, 2017 3:00 pm
Forum: Phase Changes & Related Calculations
Topic: Change in internal energy= 0
Replies: 4
Views: 553

Change in internal energy= 0

What are the necessary circumstances for a system's change in internal energy to be 0?
by EmmaShahabi1L
Thu Jan 26, 2017 2:02 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Isothermal reversible systems
Replies: 2
Views: 428

Isothermal reversible systems

Which equation would we use to calculate the work for an isothermal reversible process? For this question we know only the initial and final volumes, the initial pressure and initial temperature.
by EmmaShahabi1L
Thu Jan 26, 2017 11:59 am
Forum: Administrative Questions and Class Announcements
Topic: Quiz 1
Replies: 3
Views: 613

Re: Quiz 1

Yeah from what the professor's said in lecture, the derivations are mostly for our benefit to understand the overall concepts and connecting ideas. However the actual problems will most likely be more concrete.
by EmmaShahabi1L
Thu Jan 19, 2017 1:38 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Bond Enthalphy Vs Standard Enthalpy of Formation
Replies: 1
Views: 266

Re: Bond Enthalphy Vs Standard Enthalpy of Formation

I think the key point here is that Standard Enthalpy of Formation is the energy required to form one molecule of a substance in it's *standard* state, so all the calculations must include the elements in their standard states as well. In contrast, Bond enthalpy is the energy required to dissolve one...
by EmmaShahabi1L
Thu Jan 12, 2017 1:06 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Enthalpy sign changes
Replies: 2
Views: 322

Enthalpy sign changes

When using bond enthalpy values or simply just plugging in enthalpy values, when do you change the sign of the value before summating the equation? For reference, number 59 of the chapter 8 homework.

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