## Search found 17 matches

Sat Mar 12, 2016 1:57 am
Forum: *Chem3D
Topic: Ring flip
Replies: 1
Views: 716

### Ring flip

Is the ring flip the same as rotating the structure 180 degrees? It seems like that ends up being the correct ring flip.
Wed Mar 09, 2016 5:44 pm
Forum: *Alcohols
Topic: type of alcohol
Replies: 1
Views: 333

### type of alcohol

How do you determine what type of alcohol a compound is?

For example, #20 in ch.2 -

2methyl-2butanol?
Fri Mar 04, 2016 4:08 pm
Topic: Curve Arrows
Replies: 1
Views: 336

### Re: Curve Arrows

In this case it should be double sided arrows. At first the arrow starts at the pi bond which is an electron pair attaching to the hydrogen. Then the H-Br bond get pulled to the Br making it Br-.
Mon Feb 29, 2016 1:28 am
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Rate-Determining Step
Replies: 2
Views: 453

### Re: Rate-Determining Step

This is the slowest step. This step's equation can be used to determine the rate equation, by using the coefficients in this step. The rate equation does not always match the overall equation, but it does match the rate-determining step, i.e. the slowest step.
Mon Feb 29, 2016 1:26 am
Forum: *Alkanes
Topic: Same numbering
Replies: 1
Views: 253

### Re: Same numbering

If the numbering is the same each way, then assign the lower number to the substances in alphabetical order.
Tue Feb 16, 2016 9:51 pm
Forum: First Order Reactions
Topic: 15.29 a and b
Replies: 1
Views: 299

### Re: 15.29 a and b

The textbook does this in order to eliminate the negative sign in the first order equation. If you do it the other way you have to account for the negative sign in the equation.
Mon Feb 08, 2016 12:13 am
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: cell diagram order
Replies: 1
Views: 265

### cell diagram order

IN cell diagrams, does it matter which order the substances are in within each chamber? Within the anode or cathode side of the diagram would it matter if you switched the order of the substances?
Sun Feb 07, 2016 11:36 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: cell diagram order
Replies: 1
Views: 256

### cell diagram order

IN cell diagrams, does it matter which order the substances are in within each chamber? Within the anode or cathode side of the diagram would it matter if you switched the order of the substances?
Sun Jan 31, 2016 11:50 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Internal Energy and Pressure
Replies: 1
Views: 334

### Re: Internal Energy and Pressure

the change in internal energy is not only determined by the pressure of the gases. The internal energy relies on change in enthalpy, pressure and volume. If the pressure is increased and everything else is constant, then the internal energy will decrease. However if the internal energy change is dec...
Mon Jan 25, 2016 12:30 am
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Determining Spontaneity
Replies: 7
Views: 533

### Re: Determining Spontaneity

spontaneity is a concept that does't just depend on deltaH. It is when delta G is negative. Delta G depends on delta H, temperature, and delta S. Just because a reaction is exothermic, it is not necessarily spontaneous.
Sun Jan 17, 2016 11:01 pm
Forum: Phase Changes & Related Calculations
Topic: Work equation
Replies: 2
Views: 455

### Work equation

Hello I am still confused on when you are supposed to disregard the negative sign in the equation: -PV=W. Also why do we use the conversion factor 101.3 kpa to convert L atm to joules. Thank you.
Sun Jan 10, 2016 5:48 pm
Forum: Phase Changes & Related Calculations
Replies: 2
Views: 296

In the example in the course reader describing hess's law: N2 + O2 --> 2NO H=180kj 2NO + O2 --> 2NO2 H=-112kj Why do the change in enthalpies in the steps have different signs? (one is positive the other negative) I am confused because both steps are forming one compound. I thought when two compound...
Sun Nov 29, 2015 6:39 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Final 2014 Number 5 (.mov)
Replies: 1
Views: 321

### Final 2014 Number 5 (.mov)

Video answering and explaining number 5 from Final exam 2014.
Sun Nov 29, 2015 6:28 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Question 5 from Fall 2014 Final Exam (flv)
Replies: 1
Views: 286

### Question 5 from Fall 2014 Final Exam (flv)

Video (.flv) explanation and answering Question 5 from Fall 2014 Final Exam.
Sat Oct 24, 2015 10:19 pm
Forum: Resonance Structures
Topic: 3.57 part a
Replies: 1
Views: 342

### 3.57 part a

I understand that SO3 2- has 4 resonance structures that work. The structure with 3 sets of double has more bonds than the other three with just one double bond. Why can't you just represent the lewis structure solely on the one with three double bonds? From my understanding the structure with the m...
Sun Oct 18, 2015 10:58 pm
Forum: Empirical & Molecular Formulas
Topic: Mass of Empirical & Molecular Formulas
Replies: 1
Views: 315

### Re: Mass of Empirical & Molecular Formulas

The empirical formula can never exceed the molecular formula. The molecular formula is typically multiples of the empirical formula. The two can also equal each other.
Sun Oct 11, 2015 10:01 pm
Forum: Empirical & Molecular Formulas
Topic: Atomic Orbitals
Replies: 1
Views: 359

### Re: Atomic Orbitals

We are not responsible for knowing the f orbital shapes. Apparently they are far too complicated. So for the d orbital there are 5 different shapes. Three of them look similar, just oriented in different angles. These each have four nodes which take up space in between the axis. Another d orbital sh...