Search found 15 matches

by csebastiani_1B
Fri Mar 10, 2017 9:20 pm
Forum: Student Social/Study Group
Topic: Chem 14BL Lec 1 Lab Switch
Replies: 1
Views: 484

Re: Chem 14BL Lec 1 Lab Switch

Would anyone enrolled in Lab 1A (Tues 8-10:50am), 1B (Tues 11am-1:50pm), or 1M/N (both on Fri 8-10:50am) be willing to switch labs with me? I'm currently enrolled in Lab 1I (Thurs 2-4:50pm) but have a schedule conflict. Please let me know! Hey i can switch with you. My email is csebastiani115@aol.com
by csebastiani_1B
Mon Mar 06, 2017 7:00 pm
Forum: *Cycloalkanes
Topic: Numbering of Substituents [ENDORSED]
Replies: 8
Views: 2105

Re: Numbering of Substituents [ENDORSED]

If numbering order doesn't matter, then how is 1-ETHYL-3-Methyl-4-PROPYLCYCLOHEXANE wrong as opposed to 4-ETHYL-2-METHYL-1-PROPYLCYCLOHEXANE? Do you have to add all the numbers up and see which one gives the lowest? No you don't add them up. They both have 1 as being the lowest value so then you lo...
by csebastiani_1B
Thu Feb 23, 2017 10:29 pm
Forum: Administrative Questions and Class Announcements
Topic: Organic Chem [ENDORSED]
Replies: 2
Views: 412

Re: Organic Chem [ENDORSED]

Alright awesome. Thank you!
by csebastiani_1B
Thu Feb 23, 2017 3:45 pm
Forum: Administrative Questions and Class Announcements
Topic: Organic Chem [ENDORSED]
Replies: 2
Views: 412

Organic Chem [ENDORSED]

Why are we starting in chapter 4 of the organic textbook?
by csebastiani_1B
Sun Feb 19, 2017 9:23 pm
Forum: Method of Initial Rates (To Determine n and k)
Topic: Power issues
Replies: 2
Views: 414

Power issues

Hey so when i did question 15.19 i got all of the correct answers except for the k value. The number in the solutions is 2.85x10^-12 but i got 2.85 and I'm not sure how. Can somebody show me what they plugged in to get k to see where my mistake is because i don't have a solution manual?
by csebastiani_1B
Tue Feb 14, 2017 10:02 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Ch 8 Exercise 41
Replies: 1
Views: 268

Re: Ch 8 Exercise 41

They are set equal to each other because the heat lost by the water goes to the ice. Also i think they are equal to each other with a negative sign like this -q(ice)=q(water)
by csebastiani_1B
Wed Feb 08, 2017 10:30 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: HW 14.9
Replies: 3
Views: 389

Re: HW 14.9

Evelin Escobedo wrote:Can someone also go over how to use the equation to get gibbs free energy in this example?

n is the moles of e that is transferred and by balancing the reaction in part a we get that n=2 and then F is faradays constant and Ecell is given so you plug in those three to get dG for the reaction
by csebastiani_1B
Sun Feb 05, 2017 4:49 pm
Forum: Balancing Redox Reactions
Topic: 14.17
Replies: 2
Views: 388

14.17

14.17 (a) Write balanced half-reactions for the redox reaction of an acidi ed solution of potassium permanganate and iron(II) chloride. (b) Write the balanced equation for the cell reaction and devise a galvanic cell to study the reaction (write its cell diagram). Can anybody help me out with this q...
by csebastiani_1B
Sun Jan 29, 2017 7:39 pm
Forum: Administrative Questions and Class Announcements
Topic: Quiz 1 Preparation Answers
Replies: 130
Views: 17667

Re: Quiz 1 Preparation Answers

Why doesn't process 1 in #7 lead to an increase in entropy?
by csebastiani_1B
Fri Jan 27, 2017 10:59 am
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Quiz Solutions?
Replies: 1
Views: 277

Quiz Solutions?

Are there solutions to the practice quizzes in the course reader, or anywhere else?
by csebastiani_1B
Wed Jan 25, 2017 10:23 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: 9.13
Replies: 5
Views: 699

9.13

During the test of an internal combustion engine, 3.00 L of nitrogen gas at 18.5 C was compressed suddenly (and irreversibly) to 0.500 L by driving in a piston. In the process, the temperature of the gas increased to 28.1 C. Assume ideal behavior. What is the change in entropy of the gas? Anybody he...
by csebastiani_1B
Wed Jan 18, 2017 9:22 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: #8.85
Replies: 1
Views: 378

#8.85

N2 + O2 --> 2NO dH° 180.6 kJ (b) How much heat is absorbed in the oxidation of 5.45 L of nitrogen measured at 1.00 atm and 273 K? (c) When the oxidation of N2 to NO was completed in a bomb calorimeter, the heat absorbed was measured as 492 J. What mass of nitrogen gas was oxidized? Can anybody help ...
by csebastiani_1B
Tue Jan 17, 2017 7:15 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: 8.65
Replies: 2
Views: 878

Re: 8.65

Awesome. Thank you!
by csebastiani_1B
Tue Jan 17, 2017 1:45 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: 8.65
Replies: 2
Views: 878

8.65

Calculate the standard enthalpy of formation of dinitrogen pentoxide from the following data,

2NO(g) + O2(g) -> 2NO2(g) deltaH=-114.1kJ
4NO2(g) + O2(g) -> 2N2O5(g) deltaH=-110.2kJ
and the deltaH for NO is +90.25

How do you go about solving this?
by csebastiani_1B
Mon Jan 16, 2017 10:51 am
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Units of Reaction Enthalpies
Replies: 11
Views: 1622

Re: Units of Reaction Enthalpies

Only for standard enthalpy of formation is it uniform to use kj/mol but if the also depends on what the question specifies. Its usually kj though

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