Search found 10 matches

by Michelle Kam 1F
Sun Mar 19, 2017 12:14 pm
Forum: *Alkanes and Substituted Alkanes (Staggered, Eclipsed, Gauche, Anti, Newman Projections)
Topic: Z/E
Replies: 1
Views: 324

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? ...
by Michelle Kam 1F
Sat Mar 11, 2017 2:36 pm
Forum: Zero Order Reactions
Topic: Units [ENDORSED]
Replies: 7
Views: 787

Re: Units [ENDORSED]

Yes, it'll be always M/Sec
by Michelle Kam 1F
Sat Mar 04, 2017 1:12 pm
Forum: *Alkanes
Topic: Naming [ENDORSED]
Replies: 92
Views: 7265

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...
by Michelle Kam 1F
Sun Feb 26, 2017 5:51 pm
Forum: Phase Changes & Related Calculations
Topic: Enthalpy
Replies: 8
Views: 726

Re: Enthalpy

For temperature, it will most likely be K.
However, either is fine if unit is specified in the answer.
by Michelle Kam 1F
Sun Feb 19, 2017 7:20 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Derivation
Replies: 2
Views: 253

Re: Derivation

This reaction comes from experimental data. Basically an equation that best fits the experimental results. Therefore, we cannot derive it.
by Michelle Kam 1F
Fri Feb 10, 2017 11:34 pm
Forum: Balancing Redox Reactions
Topic: Redox Reaction question in Practice Midterm [ENDORSED]
Replies: 2
Views: 516

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...
by Michelle Kam 1F
Fri Feb 03, 2017 11:34 pm
Forum: Balancing Redox Reactions
Topic: Easy way to remember when electrons are lost/gained
Replies: 4
Views: 419

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...
by Michelle Kam 1F
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: 443

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...
by Michelle Kam 1F
Sun Jan 22, 2017 7:13 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Universe as a system [ENDORSED]
Replies: 2
Views: 255

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!
by Michelle Kam 1F
Sun Jan 15, 2017 4:47 pm
Forum: Phase Changes & Related Calculations
Topic: Enthalpy Changes (Hess's Law)
Replies: 2
Views: 239

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...

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