Search found 15 matches

by Eman_Burney_1D
Thu Mar 16, 2017 7:21 pm
Forum: *Cycloalkenes
Topic: When to number (pg.29 intro to chem textbook)
Replies: 1
Views: 575

When to number (pg.29 intro to chem textbook)

On page 29 of the green Introduction to Organic Chemistry textbook, there is an example listed as 1,4-Cyclohexdiene. It is stated in the textbook that if there is only one possible structure, numbering is not required , and from what I got, 1,4-Cyclohexdiene has only one possible structure. So is th...
by Eman_Burney_1D
Thu Mar 16, 2017 7:12 pm
Forum: *Constitutional and Geometric Isomers (cis, Z and trans, E)
Topic: Page 49 of Organic Chem textbook-Z or E
Replies: 1
Views: 441

Page 49 of Organic Chem textbook-Z or E

On page 49 in the green introduction to chemistry textbook, there is a compound listed as (Z)-2-Fluoro-3-pentene. How is this an example of a compound with "Z"? Is F a higher priority substituent than CH3? If so, how did you know that?
by Eman_Burney_1D
Sun Mar 12, 2017 9:46 pm
Forum: *Constitutional and Geometric Isomers (cis, Z and trans, E)
Topic: Course reader page 103- cis
Replies: 2
Views: 251

Course reader page 103- cis

On page 103 of the course reader, the example on top of the page is named cis-2-pentene (example below, ignore the periods): H_3C..CH_2CH_3 .. \ ...../ .. C=C .. / .... \ ..H .... H My question is, how is this a cis example, if H_3C and CH_2CH_3 are not the same? Would this be labeled as cis just fr...
by Eman_Burney_1D
Mon Mar 06, 2017 12:02 am
Forum: *Alkanes
Topic: Quiz prep 3 question 1 [ENDORSED]
Replies: 3
Views: 485

Re: Quiz prep 3 question 1 [ENDORSED]

But if I was asked to use the IUPAC name, how would you go about doing that? How do you get 4-(1-methylethyl) decane?
by Eman_Burney_1D
Sun Mar 05, 2017 11:30 pm
Forum: *Alkanes
Topic: Quiz prep 3 question 1 [ENDORSED]
Replies: 3
Views: 485

Quiz prep 3 question 1 [ENDORSED]

Question 1 of quiz 3 preparation asks to name the compound shown below (ignore the periods, I had to use them to keep the formatting): ......................................CH(CH 3 ) 2 ......................................| CH 3 CH 2 CH 2 CH 2 CH 2 CH 2 CHCH 2 CH 2 CH 3 For the answer, I got 4-isop...
by Eman_Burney_1D
Sun Mar 05, 2017 11:05 pm
Forum: *Alkanes
Topic: IUPAC naming on page 93
Replies: 2
Views: 280

IUPAC naming on page 93

On page 93, the compound listed is (ignore the periods, I used them to keep the substituents above the specific carbons as listed on page 93) : ..... CH 3 .CH 2 CH 3 ..... | .......| CH 3 CCH 2 CHCH 2 CH 3 ...... | ...... CH_3 The name, as stated on the page, is 4-ethyl-2,2-dimethyl-hexane. What is ...
by Eman_Burney_1D
Sun Feb 26, 2017 10:37 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Textbook question 15.71
Replies: 2
Views: 349

Textbook question 15.71

Hello! For textbook exercise 15.71 (page 660), the question states: The hydrolysis of an organic nitrile, a compound containing a –C≡N group, in basic solution, is proposed to proceed by the following mechanism. Write a complete balanced equation for the overall reaction, list any intermediates, and...
by Eman_Burney_1D
Sat Feb 18, 2017 3:39 pm
Forum: General Rate Laws
Topic: Order equations
Replies: 2
Views: 242

Re: Order equations

Graphically, if you see that the line has a negative slope (slope= -k), with time on the x-axis and ln[A] on the y-axis, this will tell you it is a first-order reaction. Additionally, rate= k[A] (differential rate law) signifies this as well, versus rate= k[A]^2 signifying a second-order reaction. L...
by Eman_Burney_1D
Tue Feb 14, 2017 12:16 am
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Winter 2013 Midterm Q2A
Replies: 10
Views: 758

Re: Winter 2013 Midterm Q2A

Correct me if I am wrong, but I think if an object has a lower heat capacity, that means it cools and heats up faster, versus an object that has a higher heat capacity would heat and cool slower. So water, with the higher heat capacity, would require more ice because it cools slower than orange juic...
by Eman_Burney_1D
Sun Feb 12, 2017 9:54 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Winter 2014 Final question 2a)
Replies: 1
Views: 280

Winter 2014 Final question 2a)

On page 180 in the course reader, question 2 part a) states: "For the reaction: 2CO(g) + O_2(g) ---> 2CO_2(g) Without doing calculations, predict the sign of delta S_sys. " The answer is given, delta S_sys<0 , but there is no explanation. I am not sure what the reasoning as to why delta S_...
by Eman_Burney_1D
Sun Feb 05, 2017 9:48 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Anodes and Cathodes, and Standard Reduction Potential
Replies: 1
Views: 231

Anodes and Cathodes, and Standard Reduction Potential

In class we have been writing anode on the left hand side and cathode on the right hand side of the cell diagram. Is there a particular reason for this? Also, on page 47, I know it states that standard reduction potential is an intensive property, so that would mean the value cannot be multiplied or...
by Eman_Burney_1D
Sat Jan 28, 2017 11:57 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: HW Ch.8 question 8.25
Replies: 4
Views: 461

HW Ch.8 question 8.25

I was looking back at questions I had done, and for 8.25 I am still unsure as to why the internal energy result is negative. Here is the question: A constant-volume calorimeter was calibrated by carrying out a reaction known to release 3.50 kJ of heat in 0.200 L of solution in the calorimeter (q=-3....
by Eman_Burney_1D
Sat Jan 21, 2017 11:28 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Microstates and macroscopic property
Replies: 1
Views: 264

Microstates and macroscopic property

On the top of page 30 of the course reader there is a section that states, "example of a link between the number of accessible states (S)(microstates) and a macroscopic property (bulk property, V)." What is this referring to, as in what is the example being referred to? Also, I am not sure...
by Eman_Burney_1D
Sat Jan 14, 2017 11:27 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Specific heat capacity [ENDORSED]
Replies: 2
Views: 445

Specific heat capacity [ENDORSED]

On page 20 of our course reader, dealing with water, the amount of heat released is -2.9 kJ. Is the answer negative because H + OH ---> H2O is an exothermic reaction (because a bond is being formed, thus giving off heat), and the fact that an exothermic reaction means delta H is negative? Or does it...
by Eman_Burney_1D
Sat Jan 14, 2017 4:28 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7581
Views: 1012790

Re: Post All Chemistry Jokes Here

1. Cation: an ion with a paws-itive charge

2. Chemistry puts the "cation" in education!

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