Search found 10 matches
- Thu Mar 16, 2017 10:40 am
- Forum: *Alkanes
- Topic: Naming priorities
- Replies: 1
- Views: 389
Re: Naming priorities
Yes. First functional groups, then double/triple bonds and then substituents.
- Sun Mar 12, 2017 1:34 pm
- Forum: *Organic Reaction Mechanisms in General
- Topic: Organic Reaction Mechanism [ENDORSED]
- Replies: 2
- Views: 300
- Sun Mar 05, 2017 10:19 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Special Catalysts & Reactions
- Replies: 3
- Views: 300
Re: Special Catalysts & Reactions
I don't know any, but I think it is relative to the how much energy is needed for the reaction (if it is endothermic). I think we only need to know that Catalyst speed up the reaction by lowering the activation energy, so that more reactant has the energy to overcome the barrier and become the produ...
- Mon Feb 27, 2017 12:09 pm
- Forum: *Electrophilic Addition
- Topic: Example on Page 82 in CR
- Replies: 1
- Views: 183
Re: Example on Page 82 in CR
The Br with negative charge takes the two electrons in the single bond (shown by the arrow) and becomes Br-.
- Mon Feb 27, 2017 12:01 pm
- Forum: *Electrophilic Addition
- Topic: Relation between standard enthalpy of activation
- Replies: 1
- Views: 374
Re: Relation between standard enthalpy of activation
Ea= Δ‡H°+RT.
Δ‡H°usually dominate Ea, which is an approximation since Δ‡S° is not taking consideration.
Hope this helps.
Δ‡H°usually dominate Ea, which is an approximation since Δ‡S° is not taking consideration.
Hope this helps.
- Sun Feb 19, 2017 8:10 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Hw 15.35
- Replies: 1
- Views: 187
Hw 15.35
Hi everyone,
In the solution manual 15.35, they used the equation [A]=[A]0/1+[A]0*kt to get the 2nd order integrated rate law. Is this equation used only to derive the integrated rate law for the 2nd order reaction? Or does it work for all orders (1st and zero order) of reaction?
Thanks!
In the solution manual 15.35, they used the equation [A]=[A]0/1+[A]0*kt to get the 2nd order integrated rate law. Is this equation used only to derive the integrated rate law for the 2nd order reaction? Or does it work for all orders (1st and zero order) of reaction?
Thanks!
- Mon Feb 06, 2017 8:06 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: 14.15 - half reactions and cell diagrams for solubility equilibriums
- Replies: 2
- Views: 253
Re: 14.15 - half reactions and cell diagrams for solubility equilibriums
Hi,
I am also not sure about 14.15. Especially about part a) of this question. How do you write half equations for equilibrium reactions?
Thanks!
I am also not sure about 14.15. Especially about part a) of this question. How do you write half equations for equilibrium reactions?
Thanks!
- Mon Jan 30, 2017 3:10 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: Chapter 9, Question 9.3
- Replies: 1
- Views: 187
Re: Chapter 9, Question 9.3
Yes, as long as the heat is q(rev). And yes, because the entropy would increase if there is heat added to the system.
- Wed Jan 25, 2017 7:16 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: 8.99 Heat Capacity
- Replies: 1
- Views: 234
Re: 8.99 Heat Capacity
The negative sign is used to balance out the negative sign for -20.0KJ.
This is how I interpreted the question:
Since this is an exothermic reaction, 20.0 KJ of energy is released by the reaction. This means 20.0 KJ is supplied as heat (q) into water.
q=20.0KJ=4.184*800*ΔT
ΔT=5.98C
Hope this helps!
This is how I interpreted the question:
Since this is an exothermic reaction, 20.0 KJ of energy is released by the reaction. This means 20.0 KJ is supplied as heat (q) into water.
q=20.0KJ=4.184*800*ΔT
ΔT=5.98C
Hope this helps!
- Sat Jan 21, 2017 5:11 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Can some explain reversible and irreversible processes? [ENDORSED]
- Replies: 2
- Views: 312
Re: Can some explain reversible and irreversible processes? [ENDORSED]
Here are the definitions from the textbook: "A reversible process is one that can be reversed by an infinitely small change in a variable. Expansion against an external pressure that differs by a finite (measurable) amount from the pressure of the system is an irreversible process in the sense ...