CHEMISTRY COMMUNITY

ariana_cruz_1C

In the organic textbook, it names alcohols, for example, 2-propanol, but on the practice finals it names them more like propan-2-ol

Is one method preferred for the final or does it not matter?

ariana_cruz_1C

Just to add on, you also want to look at if the two priority groups on the cyclohexane are axial or equatorial. If they are both axial up or both axial down /both equatorial up or both equatorial down, it will be Cis. If one priority group is axial up and the other is axial down then it is considere...

ariana_cruz_1C

Chair conformation is more stable than the boat confirmation. In the boat confirmation the hydrogens are bumping into each other (flagpole interactions), therefore causing steric strain. Chair conformation has no steric strain because no atoms are bumping into each other, the H on the adjacent C is ...

ariana_cruz_1C

Can someone explain how to name the second structure in this question?

It's 1-(3-chlorocycloheptyl)-2-methylpropan-2-ol

I'm confused why it was named in that order. Where did they start numbering? What does the 1 represent in the beginning? & which carbon chain was seen as the longest/shortest?

ariana_cruz_1C

Jocelyn_Dao_2N wrote:Why is the answer for number 4, 4-butyl-1,2-dimethylcyclohexane and not 1,butyl-3,4-butylcyclohexane?

remember we want to start numbering wherever we could get the lowest number, so in 4-butyl-1,2-dimethylcyclohexane (4+2+1 gives us 7) whereas 1,butyl-3,4-butylcyclohexane (4+3+1 gives us 8)

ariana_cruz_1C

How do we distinguish which of these reactions is happening? Any tips?

ariana_cruz_1C

I'm not sure if this is an obvious answer but on page 93 of the course reader what do the numbers (1,2,2) in 1-Bromobutane, 2-Chlorobutane, &
2-Iodobutane mean?

ariana_cruz_1C

ariana_cruz_1C wrote:Hi, can someone show me how they did #7, I know you use the first order integrated rate law, but when I work it out I am not getting the answer that is posted.

nevermind!

ariana_cruz_1C

Hi, can someone show me how they did #7, I know you use the first order integrated rate law, but when I work it out I am not getting the answer that is posted.

ariana_cruz_1C

Hi, I am still uncertain to how they got 2259 J/g for delta_h vaporization of water when the formula sheet shows its 40.7 kgxmol-1.
So exactly was that calculated ?

Thanks in advance !

ariana_cruz_1C

Okay I see thank you!

ariana_cruz_1C

Hi, so I'm pretty sure to get 2 moles of electrons you split them into half reactions first. So you initially have 2Ce4+ = 2Ce3+ On the left side you have a charge of 8+ (2 x 4+) and on the right you have a charge of 6+, so you need 2 more electrons to balance it out. In the second half rxn you init...

ariana_cruz_1C

Hi, im not sure if this is an obvious answer, but in comparing 14.5 (a) and 14.5 (c) I am a bit confused as to why some H2O's cancel out from both sides and others don't. For example in part (a) you have the FINAL balanced reaction 6OH- + 3H2O + Br- = BrO3- + 6H2O + 6e- and you're left with H2O on b...

ariana_cruz_1C

804748473 wrote:If number 11 was on a quiz, would we be given the specific heat capacity of water?

It's on our formula sheet so I assume so!

ariana_cruz_1C

Why in #5 do we need to flip the reaction 2H2 + O2 = 2H2O and not the other ones ?

ariana_cruz_1C

Can someone explain why in #11 does q go from -23.8 to 23.8?

ariana_cruz_1C

Hi I am a bit confused as to why in the solutions manual, the heat capacity used in this problem is negative (-4.184).

The problem says to assume the molar heat capacity is the same as water, so initially I thought that would be positive?

ariana_cruz_1C

Hi, this probably simple, but I am a bit confused on difference between an extensive and intensive property?
I know heat capacity is an extensive property because the heat required depends on the amount of substance, but what makes an intensive property?

ariana_cruz_1C

Hi, so in the course reader it says Quiz 1 will start January 31 in your discussion section. So your quiz will be within that week.

CHEMISTRY COMMUNITY

Search found 19 matches

How to name the Alcohol

Re: Cis Trans

Re: Chair vs. Boat

2015 Final Q9A

Re: Quiz 3 Winter 2017

Re: Types of reactions

Re: Naming (pg 93 course reader) [ENDORSED]

Re: Quiz 2 Winter 2017

Re: Quiz 2 Winter 2017

Re: Midterm 2013 Question 3A

Re: 14.5 Basic Solutions

Re: Homework Problem 14.9

14.5 Basic Solutions

Re: Quiz 1 Preparation Answers

Re: Quiz 1 Preparation Answers

Re: Quiz 1 Preparation Answers

8.99 Heat Capacity

Intensive vs. Extensive [ENDORSED]

Re: Quiz Date? [ENDORSED]