## Search found 16 matches

Thu Mar 10, 2016 9:22 pm
Forum: *Alcohols
Topic: Winter 2012 Final: 6C
Replies: 1
Views: 422

### Winter 2012 Final: 6C

How does one name a compound with multiple functional groups? How do you know which take priority over each other?
Thu Mar 10, 2016 9:20 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Winter 2012 Final: 1B
Replies: 1
Views: 303

### Winter 2012 Final: 1B

How do you know that you are suppose to heat the products back up to 398K after calculating the enthalpy for cooling the reactants and the reaction?
Mon Mar 07, 2016 8:31 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Calculating residual entropy
Replies: 3
Views: 1070

### Calculating residual entropy

How do you calculate which has a greater residual entropy, NO or BF3?
Mon Mar 07, 2016 8:26 pm
Forum: *Alkenes
Topic: Heat Capacity of Ethene
Replies: 1
Views: 378

### Heat Capacity of Ethene

In the 2011 final practice exam, number 1-C it asks which has a higher heat capacity, Ethane or Ethene. Why is is that Ethane has a higher heat capacity when Ethene has a double bond?
Wed Feb 24, 2016 5:28 pm
Forum: *Alkanes and Substituted Alkanes (Staggered, Eclipsed, Gauche, Anti, Newman Projections)
Topic: Drawing benzene
Replies: 1
Views: 300

### Drawing benzene

1.37 (b) how are the benzene-like rings in phenanthrene connected, and what type of structures does this type ring fusion give rise to?
Wed Feb 24, 2016 5:26 pm
Forum: *Alkanes and Substituted Alkanes (Staggered, Eclipsed, Gauche, Anti, Newman Projections)
Topic: Drawing Structures
Replies: 2
Views: 314

### Drawing Structures

1.29 Draw a structure of (Z)-3-methyl-3-heptene.
Tue Feb 09, 2016 9:33 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Winter 2012 Q7A&B
Replies: 1
Views: 277

### Re: Winter 2012 Q7A&B

You can have a negative cell potential, it is just preferred to have a positive. With a negative you would need an external voltage.
Tue Feb 09, 2016 9:29 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Midterm 2013 #7
Replies: 3
Views: 549

### Re: Midterm 2013 #7

Because the reaction is already reversed in the "given," it is unnecessary to use the equation E = Cathode - Anode. You can instead just add the two equations together to get Ecell.
Mon Jan 18, 2016 5:51 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Bond Enthalpies: Question 8.77
Replies: 1
Views: 360

### Bond Enthalpies: Question 8.77

"Use the mean bond enthalpies to calculate the lowering in molar energy when resonance is allowed between the kekule structures of benzene." how would one go about this problem?
Sun Jan 10, 2016 7:33 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Enthalpy Hmwk 8.39
Replies: 1
Views: 275

### Enthalpy Hmwk 8.39

How much heat is needed to convert 80.0 g of ice at 0.0 C into liquid water at 20.0 C.
Finding the second part of the answer (energy needed to heat the temperature of the water after melting), why do you multiply the heat capacity of water by the grams of water and not by g/mol?
Thu Dec 03, 2015 3:25 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Response to Equilibria to Changes in Conditions
Replies: 1
Views: 547

### Response to Equilibria to Changes in Conditions

Question 11.71 The four gases NH3, O2, NO, H2O are mixed in a reaction vessel and allowed to reach equilibrium. Changes are made. Considering each change separately, state the effect that the change has on the original equilibrium values of the quantity in the second column. The temperature and volu...
Sun Nov 15, 2015 11:36 pm
Forum: Lewis Acids & Bases
Topic: Strong Acids and Bases
Replies: 2
Views: 346

### Strong Acids and Bases

Homework Help! 12.32
The pH of several solutions was measured in a lab; Convert each of the following pH values into the molarity of H3O+ ions:
a: 3.3 (orange juice)
b: 6.7
c: 4.4
d: 8.1
Tue Nov 03, 2015 7:14 pm
Forum: Trends in The Periodic Table
Replies: 2
Views: 471

Question 5B. on the 2014 Midterm: Arrange S^2-, Cl-, and P^3- in order of increasing ionic radius.

It was not CL>S>P
Tue Nov 03, 2015 4:05 pm
Forum: Trends in The Periodic Table
Replies: 2
Views: 522

The question on the practice exam was "Arrange S^2-, Cl- , and P^3- in order of increasing ionic radius.

Sun Oct 25, 2015 6:35 pm
Forum: Ionic & Covalent Bonds
Topic: Question 3.49
Replies: 1
Views: 339

### Question 3.49

How do you determine the formal charge of CN-?
Thu Oct 15, 2015 8:32 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Energy Levels of a particle in a two-dimensional square box
Replies: 1
Views: 776

### Energy Levels of a particle in a two-dimensional square box

Question 1.49 - (The energy levels of a particle of mass m in a two-dimnesional square box of side L are given by (n1^2 + n2^2) h^2 / 8mL^2. )

How does one find the values of the quantum numbers n1 and n2. The solutions manual doesn't give a good explanation.