For the reaction: 2CO(g) + O2(g) ---> 2CO2(g)
Without doing calculations, predict the sign of deltaSsys.
How can you predict deltaSsys is less than 0?
Search found 20 matches
- Sat Mar 12, 2016 9:50 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: Winter 2014 Final Q2A
- Replies: 2
- Views: 584
- Fri Mar 11, 2016 12:40 am
- Forum: *Free Energy of Activation vs Activation Energy
- Topic: Question 7B 2012 Final
- Replies: 2
- Views: 540
Re: Question 7B 2012 Final
2^2
----- = 2^(2-1)=2^1
2^1
Similarly,
e^(-0.60Ea/RT)
--- = e^([-0.60-(-1.00)]Ea/RT)= e^(0.40Ea/RT)
e^(-1.00Ea/RT)
Sorry, didn't know how to do it fancy...
----- = 2^(2-1)=2^1
2^1
Similarly,
e^(-0.60Ea/RT)
--- = e^([-0.60-(-1.00)]Ea/RT)= e^(0.40Ea/RT)
e^(-1.00Ea/RT)
Sorry, didn't know how to do it fancy...
- Fri Mar 11, 2016 12:32 am
- Forum: *Alkanes
- Topic: Quiz (C6H11)CH2CH2CH2Ch3
- Replies: 4
- Views: 1091
Re: Quiz (C6H11)CH2CH2CH2Ch3
oooh! That makes sense! Thank you!
- Fri Mar 11, 2016 12:31 am
- Forum: Interesting Applications: Rechargeable Batteries (Cell Phones, Notebooks, Cars), Fuel Cells (Space Shuttle), Photovoltaic Cells (Solar Panels), Electrolysis, Rust
- Topic: Winter 2013 Final Question 3A
- Replies: 1
- Views: 492
Re: Winter 2013 Final Question 3A
Nevermind...
- Fri Mar 11, 2016 12:29 am
- Forum: *Alkanes
- Topic: Quiz (C6H11)CH2CH2CH2Ch3
- Replies: 4
- Views: 1091
Re: Quiz (C6H11)CH2CH2CH2Ch3
Wouldn't it have to be (C6H12) to be considered a cyclohexane since cyclo alkanes follow the eq CnH2n?
- Fri Mar 11, 2016 12:26 am
- Forum: Interesting Applications: Rechargeable Batteries (Cell Phones, Notebooks, Cars), Fuel Cells (Space Shuttle), Photovoltaic Cells (Solar Panels), Electrolysis, Rust
- Topic: Winter 2013 Final Question 3A
- Replies: 1
- Views: 492
Winter 2013 Final Question 3A
How come we did not use OH- and instead used H+?
- Thu Mar 10, 2016 11:40 pm
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: Winter 2013 Question 1B
- Replies: 1
- Views: 428
Winter 2013 Question 1B
Why is specific heat capacity the second entropy 3/2R? How do we know which ideal gas to use? I try to go by the "constant pressure" or "constant volume" but its not clear to me. The volume inside the balloon did change right? so is this second entropy referring to the volume of ...
- Wed Mar 09, 2016 11:23 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: Winter 2012 Final Q3D
- Replies: 1
- Views: 376
Winter 2012 Final Q3D
The question asks for the cell potential. I understand where all the numbers came from except for n=6. Can anyone explain? Thanks in advance!
- Wed Mar 09, 2016 11:02 pm
- Forum: *Cyclohexanes (Chair, Boat, Geometric Isomers)
- Topic: Winter 2011 Final Q8B
- Replies: 2
- Views: 489
Re: Winter 2011 Final Q8B
Please help!
- Wed Mar 09, 2016 10:09 pm
- Forum: *Cyclohexanes (Chair, Boat, Geometric Isomers)
- Topic: Winter 2011 Final Q8B
- Replies: 2
- Views: 489
Winter 2011 Final Q8B
The question asks to "draw the most stable conformation possible for 1,3,5-trimethylcyclohexane."
Why do all of the substituents go in the equatorial position and not axial?
Why do all of the substituents go in the equatorial position and not axial?
- Tue Mar 08, 2016 8:30 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: WINTER 2011 FINAL 1B
- Replies: 2
- Views: 491
Re: WINTER 2011 FINAL 1B
I was wondering this too...
- Tue Mar 08, 2016 8:29 pm
- Forum: Phase Changes & Related Calculations
- Topic: Winter 2011 Final 1A: Heat required to boil water
- Replies: 3
- Views: 738
Re: Winter 2011 Final 1A: Heat required to boil water
...so what would the answer be?
- Sun Mar 06, 2016 1:47 pm
- Forum: *Identifying Primary, Secondary, Tertiary, Quaternary Carbons, Hydrogens, Nitrogens
- Topic: Trans and Cis
- Replies: 2
- Views: 914
Re: Trans and Cis
I feel like that would be easier to tell because the drawing will show the extremities either pointing up/down or in opposite sides. If you google "line structure trans cis" images you will be able to see what I mean.
- Sun Mar 06, 2016 1:21 pm
- Forum: *Cyclohexanes (Chair, Boat, Geometric Isomers)
- Topic: Chair vs Boat Conformation
- Replies: 2
- Views: 970
Re: Chair vs Boat Conformation
The chair conformation is more stable than the boat conformation because the molecules are as far away from each other as possible (on opposite sides), thus, there is less repulsion.
- Sun Mar 06, 2016 1:18 pm
- Forum: *Alkanes
- Topic: Priority of Subsituents
- Replies: 3
- Views: 583
Re: Priority of Subsituents
Halogens get priority! I remember he said this on Monday's lecture.
- Sun Mar 06, 2016 1:14 pm
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: Residual Entropy
- Replies: 1
- Views: 432
Residual Entropy
For Winter 2011 Final Exam, question 1c says "Circle which has greater residual entropy at 0K: NO or BF3." I guessed NO out of luck but don't really know what residual entropy is or how to tell based on the molecules. Can anyone explain? Thanks in advance!
- Sat Feb 27, 2016 8:38 pm
- Forum: *Alkanes
- Topic: Quiz 3 Preparation
- Replies: 34
- Views: 13001
Quiz 3 Preparation
For the question #2 on page 43, it states to name the compound CH3CH(CH3)CH(CH2CH3)C(CH3)3.
I have named the compound 3-ethyl-2,2,4-trimethyl pentane but the answer says its 2,2,4-trimethyl-3-ethyl pentane. Why?
I have named the compound 3-ethyl-2,2,4-trimethyl pentane but the answer says its 2,2,4-trimethyl-3-ethyl pentane. Why?
- Sun Feb 07, 2016 9:11 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Winter 2011 Midterm: Question #1A
- Replies: 1
- Views: 394
Winter 2011 Midterm: Question #1A
For this question, I was able to understand how one gets q and delta T, but I do not understand where the front negative in q comes from. Help?
- Wed Jan 20, 2016 10:20 pm
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: Entropy Equations
- Replies: 2
- Views: 586
Re: Entropy Equations
My best advice is to go over the different examples as well as the self-tests in chapter 8 of your textbook. Its really helpful and one can understand the general idea for each equation.
- Wed Jan 20, 2016 10:15 pm
- Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
- Topic: Enthalpy and Entropy
- Replies: 3
- Views: 880
Re: Enthalpy and Entropy
Something that really helped me out when thinking about entropy is to think about a room. If you clean up your room, that takes effort. But if you leave your room messy, then it takes no effort. So entropy is just measure of disorder.