Search found 9 matches

by Ranica Hortelano 2D
Sun Mar 12, 2017 8:14 pm
Forum: *Identifying Primary, Secondary, Tertiary, Quaternary Carbons, Hydrogens, Nitrogens
Topic: Picture of difference between sec/iso and neo/tert?
Replies: 3
Views: 774

Re: Picture of difference between sec/iso and neo/tert?

To simplify things, just by looking at the structure a molecule with iso- in it sort of has a "Y" branch in its structure, while neo- has a triple branched structure.
If you search images of isopropyl and neopentyl, for example, you can see these structures.
by Ranica Hortelano 2D
Sun Mar 05, 2017 6:35 pm
Forum: *Alkanes
Topic: Naming Organic Compounds
Replies: 4
Views: 299

Re: Naming Organic Compounds

I think this could work because essentially you want to yield the lowest number and typically you would choose 4-ethyl-2, 2-dimethyl-hexane.
by Ranica Hortelano 2D
Sun Feb 26, 2017 7:49 pm
Forum: *Electrophiles
Topic: Nucleophile and Electrophile
Replies: 3
Views: 305

Re: Nucleophile and Electrophile

Yes, fluorine is a nucleophile since it is highly electronegative while Li and Na are electrophiles since they are less electronegative and more positive.
by Ranica Hortelano 2D
Sun Feb 19, 2017 8:23 pm
Forum: Method of Initial Rates (To Determine n and k)
Topic: Pre-equilibrium approach and steady-state approach
Replies: 3
Views: 920

Re: Pre-equilibrium approach and steady-state approach

Direct computation is used experimentally and uses software. For the steady-state method you would have to assume that the concentration of the intermediate is constant (rate of change of concentration is 0) and the rate-determining step is unknown while the pre-equilibrium method assumes that the r...
by Ranica Hortelano 2D
Sun Feb 12, 2017 7:49 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Order of ions in cell diagram
Replies: 1
Views: 205

Re: Order of ions in cell diagram

No, it doesn't matter the order as long as you separate them with commas and also separate them in terms of phase.
by Ranica Hortelano 2D
Sun Feb 05, 2017 8:41 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: order of galvanic cell
Replies: 2
Views: 248

Re: order of galvanic cell

For cell diagrams the anode is always on the left side while the cathode is on the right side. Whatever is losing electrons is the anode and whatever is gaining electrons is the cathode. For example, given Cu(s)|Cu 2+(aq)||Fe 3+(aq), Fe 2+(aq)|Pt(s) on the far left you always have the anode in solid...
by Ranica Hortelano 2D
Sun Jan 29, 2017 8:16 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Favorable Reactions
Replies: 1
Views: 302

Re: Favorable Reactions

In order for delta G to be negative (which entails that the reaction is spontaneous) you want delta S to be positive. If delta S is negative, the whole equation, delta H minus T times delta S, would be positive; delta G would be positive, thus the reaction would be non spontaneous. For delta S, if y...
by Ranica Hortelano 2D
Sun Jan 22, 2017 4:02 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Calculating Change in Entropy
Replies: 1
Views: 199

Re: Calculating Change in Entropy

You would use standard enthalpy of formation when the elements in your equation are in their most stable form. For example, aluminum's most stable form would be its solid form and carbon's most stable form would be graphite. In solving a standard enthalpy of formation problem you would be given a ch...
by Ranica Hortelano 2D
Sun Jan 15, 2017 8:00 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Standard Enthalpy of Formation
Replies: 2
Views: 228

Re: Standard Enthalpy of Formation

Oxygen gas and nitrogen gas are in their most stable form. They have standard enthalpy formation of 0 because nothing changes when they are formed from themselves. For example, in the reaction O₂ (g) --> O₂(g) the enthalpy change would equal 0.

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