## Search found 10 matches

Sat Mar 12, 2016 5:39 pm
Forum: *Alkanes and Substituted Alkanes (Staggered, Eclipsed, Gauche, Anti, Newman Projections)
Topic: Final Question
Replies: 2
Views: 422

### Re: Final Question

I think you should know the angles, but I wouldn't worry about the exact energies of gauche, eclipsed etc. You probably should just know which is higher energy in relation to the others.
Mon Mar 07, 2016 1:14 pm
Forum: *Alkynes
Topic: Naming
Replies: 3
Views: 970

### Re: Naming

Also keep in mind that the order of priority for assigning the number to a carbon goes functional group, number of bonds, and then substituents.
Sun Mar 06, 2016 11:02 pm
Forum: *Calculations Using ΔG° = -RT ln K
Topic: C-H Bond +4 kJ/mol
Replies: 2
Views: 895

### Re: C-H Bond +4 kJ/mol

The -12 kJ is the given value. Since we know that there are three eclipsed bonds, we divide by three to get the 4kJ value. The 4kJ value indicates the extra energy it takes to form this conformation.
Sun Feb 28, 2016 8:39 pm
Forum: *Alkanes
Topic: Naming with prefix di-
Replies: 1
Views: 324

### Re: Naming with prefix di-

Yes that is why. Convention says that you need to say 2,2 one for each methyl. If you don't it will be confusing and people will assume that you simply forgot to mention where one of the methyls is located.
Sun Feb 21, 2016 8:47 pm
Forum: First Order Reactions
Topic: Definition of K prime
Replies: 3
Views: 6254

### Re: Definition of K prime

yes. The rate of forward and reverse reaction (k and k prime) are only equal at equilibrium.
Sun Feb 07, 2016 7:51 pm
Forum: Balancing Redox Reactions
Topic: Balancing Reactions
Replies: 1
Views: 326

### Re: Balancing Reactions

If you have a method that works it should be fine either way. Most people balance the oxygen first as it is easier and the way that we learned to do it.
Sun Jan 31, 2016 8:51 pm
Forum: Balancing Redox Reactions
Topic: Acidic vs. Basic Solutions
Replies: 1
Views: 414

### Re: Acidic vs. Basic Solutions

There is no difference between using a acid or base solution, but you may have to flip a half reaction.
Sun Jan 24, 2016 10:03 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Reversible and Isothermal
Replies: 2
Views: 526

### Re: Reversible and Isothermal

q=-w because u=0 in this scenario. U is 0 because the ideal gas is isothermal
Sun Jan 17, 2016 8:14 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Heat of Combustion
Replies: 1
Views: 314

### Re: Heat of Combustion

If you do what you said, the answer will be the same, so your method probably works. The problem was a state function, so you could do the method you chose.
Sun Jan 10, 2016 11:36 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Work Formulas
Replies: 1
Views: 299

### Re: Work Formulas

Different types of work imply that energy can take various forms. Use the formula that contains the variables given in the problem or the formula that cancels out the units to give you energy.