Search found 10 matches
- Sun Mar 19, 2017 12:14 pm
- Forum: *Alkanes and Substituted Alkanes (Staggered, Eclipsed, Gauche, Anti, Newman Projections)
- Topic: Z/E
- Replies: 1
- Views: 1232
Z/E
When trying to name molecules either Z and E, we have to compare the atomic numbers of the molecules attached to the sp2 hybridized carbon and pick the one with bigger atomic number . So what if two the we're comparing have the same atomic number? Like CH2CH3 vs. CH3. Which one would you pick then? ...
- Sat Mar 11, 2017 2:36 pm
- Forum: Zero Order Reactions
- Topic: Units [ENDORSED]
- Replies: 7
- Views: 1936
Re: Units [ENDORSED]
Yes, it'll be always M/Sec
- Sat Mar 04, 2017 1:12 pm
- Forum: *Alkanes
- Topic: Naming [ENDORSED]
- Replies: 93
- Views: 16699
Re: Naming [ENDORSED]
we use the dashes to separate numbers from words. For example, 3-methyl-2-ethylpropane Note that we do not use the dashes when separating two numbers; instead, we use a comma. Like this, 2,3-dimethylbutane Also, the name of our last substituent and the name of our longest carbon chain (the parent ch...
- Sun Feb 26, 2017 5:51 pm
- Forum: Phase Changes & Related Calculations
- Topic: Enthalpy
- Replies: 8
- Views: 1634
Re: Enthalpy
For temperature, it will most likely be K.
However, either is fine if unit is specified in the answer.
However, either is fine if unit is specified in the answer.
- Sun Feb 19, 2017 7:20 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Derivation
- Replies: 2
- Views: 492
Re: Derivation
This reaction comes from experimental data. Basically an equation that best fits the experimental results. Therefore, we cannot derive it.
- Fri Feb 10, 2017 11:34 pm
- Forum: Balancing Redox Reactions
- Topic: Redox Reaction question in Practice Midterm [ENDORSED]
- Replies: 4
- Views: 7651
Re: Redox Reaction question in Practice Midterm [ENDORSED]
First, we need to find which is oxidized and which is reduced. We can calculate the charge for Cr in Cr2O7 2+ by knowing that Oxygen usually has a charge of 2-. charge of Cr + 7(-2) = -2 Cr has a charge of 6+. The reactant Cr has a charge of 6+ and the product Cr has a charge 3+. In similar way, you...
- Fri Feb 03, 2017 11:34 pm
- Forum: Balancing Redox Reactions
- Topic: Easy way to remember when electrons are lost/gained
- Replies: 4
- Views: 2417
Re: Easy way to remember when electrons are lost/gained
This is what they teach you in the Life Science classes OIL: Oxidation is Loss RIG: Reduction is Gain In Chemistry classes, it seems like they teach you LEO and GER LEO: Losing electron is Oxidation GER: Gaining electron is Reduction They try to make it like "LEO the lion says GER" or some...
- Sun Jan 29, 2017 12:03 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: Delta S and what it favors?
- Replies: 2
- Views: 4885
Re: Delta S and what it favors?
A positive Delta S indicates a favorable or spontaneous process. This means that the reaction will proceed without any energy input. A negative Delta S indicates an unfavorable or nonspontaneous process, meaning that the reaction will require some energy to proceed. I don't think it'd be too helpful...
- Sun Jan 22, 2017 7:13 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Universe as a system [ENDORSED]
- Replies: 2
- Views: 582
Re: Universe as a system [ENDORSED]
The universe is a closed system basically bc things cannot disappear into thin air.
We cannot gain or lose Energy in the universe.
Conservation of Energy!
We cannot gain or lose Energy in the universe.
Conservation of Energy!
- Sun Jan 15, 2017 4:47 pm
- Forum: Phase Changes & Related Calculations
- Topic: Enthalpy Changes (Hess's Law)
- Replies: 2
- Views: 515
Re: Enthalpy Changes (Hess's Law)
There are essentially three methods of calculating enthalpy. First, there is the Hess's Law, which is calculation of standard enthalpy of formation using the give enthalpy of each reactions. To find t he standard enthalpy of formation of glucose, we use the given equations to form a final equation o...