CHEMISTRY COMMUNITY

Andre Tsivis 1K

A ring structure has the carbons on the inside of each bond. When a double bond locks it into place, the ring forms bonds on the same side of the bond and not on opposite sides. A ring that has a trans structure is often unstable and irregulary looking. All circular rings will have a cis structure.

Andre Tsivis 1K

After chemistry class, a student asks a chemist for help with regards to rate constants. The chemist, in response says "k" !

Andre Tsivis 1K

If two groups are the same, it would mean that both chains would have exactly the same formula, therefore, it would be labeled as a dichloro (for your example) or (something like )a diethyl group. Because of this, priority would not matter because the chains would be equal anyways. In the regards of...

Andre Tsivis 1K

Also, the length of the substituent doesn't matter, only the placement does. A methyl group holds the same numbering priority as a larger substituting such as an isopropyl or tert-pentyl group. But as always, this ordering still has a lower priority than making the double bonds as low of a number as...

Andre Tsivis 1K

Double bonds hold priority. The best way to name cycloalkenes is to have the double bonds have priority over the substituents. However, the double bond with the most substituants directly in front of it should get the lower number, hence making the most substituent groups have lower numbers. Of cour...

Andre Tsivis 1K

I am also assuming that when a BOND is broken, 2 e- will be transferred and when there is just a single dot drawn in the Lewis structure then only that one e- will be transferred.

Andre Tsivis 1K

2 electrons are being transferred if there is a double-headed arrow, and only one electron is being transferred if there is a single-headed arrow (pg. 86 course reader).

Andre Tsivis 1K

To find a rate, a specific reaction must be given, from which a rate law can be established. Then a k value must be found by by using the Arrhenius equation and then it can be related back into the Rate law derived from a given reaction.

Andre Tsivis 1K

Does R stand for Rate or Gas constant here?

Andre Tsivis 1K

A rate law explains the rate of reactions according to parameters given. A differential rate law is helpful for explaining the rate at a certain time. The integrated rate law is helpful for finding a time where an amount of material exists and the 1/2 life laws help to explain half lives. All use co...

Andre Tsivis 1K

Oxidation occurs when a substance loses an electron. Therefore the charge increases. Reduction occurs where a substance gains an electron and reduces a substance's chemical charge. The half reactions show oxidation and reduction separately, both balanced seperately so that all of the e- cancel out o...

Andre Tsivis 1K

For some reason I can never do these problems properly. For bond enthalpies, do the broken bonds have their values negated or do the formed bonds have their enthalphy negated? Sorry if it's a dumb question but thank you in advance everyone.

Andre Tsivis 1K

An element is in its most stable form if it is in its most pure/stable state (For example Fe(s), Na(s), He(g), H2(g), C(s) are all n their elemental forms). In liquid and solid forms, an elemental state is a pure block or substance containing only that element (like a block of pure iron, or a block ...

Andre Tsivis 1K

A reversible process is one that takes place in equilibrium and is a slow gradual change from one position to the next. Because it is a continuous change, it can be reversed with an opposite reaction. On the contrary, irreversible processes occur when there is a spontaneous action of some sort such ...

Andre Tsivis 1K

I find Heat Capacity as being still useful even though it is an extensive property because it can be used to derive other more specific heat capacities. By placing a mass measure to the extensive property of Heat Capacity, other specific heat capacities can be derived according to the mass measure t...

Andre Tsivis 1K

I am a little unsure of what the term "+VE" (Course reader Pg 17) means. Also, if VE+ is the result of endothermic reactions, could the term change to be negative in the case of exothermic state changes (e.g. freezing/condensation/deposition), or does state change only yield a positive VE+...

CHEMISTRY COMMUNITY

Search found 16 matches

Re: Final 2012 Question 5

Re: Chemistry Jokes

Re: Priority Groups

Re: Numbering for Cycloalkenes

Re: Numbering for Cycloalkenes

Re: Arrow Electron Flow Ex from Course Reader

Re: Arrow Electron Flow Ex from Course Reader

Re: k and rate of reaction

Re: Quiz 1, Winter 2014 Solving for Activation Energy

Re: Rate law

Re: How to figure out Cathode and Anode Reactions?

Bond Enthalpies

Re: Elements in their most stable form

Re: Reversible and Irreversible

Re: Heat Capacity

+VE and phase change