Search found 9 matches
- Mon Mar 13, 2017 1:06 pm
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: entropy formula for change in volume
- Replies: 2
- Views: 515
Re: entropy formula for change in volume
When do I use 5/2*R and 7/2*R? To find deltaS= nRlnV2/V1 but I know there are some situations where we use deltaS=n*(5/2)*R*lnV2/V1 or the same equation but with (7/2)
- Sun Mar 05, 2017 8:49 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Quiz 3 Winter 2017
- Replies: 183
- Views: 29896
Re: Quiz 3 Winter 2017
I've been studying the textbook as well as the course reader but I can't find the section concerning the transitions.... which pages can I find them on?
- Sun Feb 26, 2017 9:26 pm
- Forum: *Organic Reaction Mechanisms in General
- Topic: Lines in Lewis Structures
- Replies: 2
- Views: 10081
Re: Lines in Lewis Structures
So at the end of the two "triangle" bolded and striped, there is a Carbon Atom. This Lewis structure also gives us the structure in 3D; the bolded triangle means that the atom attached to its end is towards the front while the atom attached to the striped triangle is towards the back. Ther...
- Sun Feb 26, 2017 9:22 pm
- Forum: General Science Questions
- Topic: Gases in Atmosphere
- Replies: 1
- Views: 529
Gases in Atmosphere
If O_3 is heavier than O_2, how come we find O_3 in the upper atmosphere?
- Sun Feb 12, 2017 7:05 pm
- Forum: Balancing Redox Reactions
- Topic: Adding H20 AND H+
- Replies: 3
- Views: 3198
Re: Adding H20 AND H+
When balancing our redox reaction (by adding H2O, H+, and OH-) can we use the couple H2O/H+ for reactions in an acidic and basic solution both or do we have to use OH- instead of H+ when working with a chemical reaction done in a basic solution?
- Sun Feb 05, 2017 11:41 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Bond Enthalpies
- Replies: 7
- Views: 1092
Re: Bond Enthalpies
What is the difference between reaction enthalpy and standard formation enthalpy? How can we tell the difference in a reaction?
- Sun Jan 29, 2017 3:50 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3741325
Re: Post All Chemistry Jokes Here
What happens to Nitrogen when the sun sets?
It becomes daytrogen and goes to bed. Good nitrogen, sleep tightrogen, don't let the bed bugs bitrogen.
It becomes daytrogen and goes to bed. Good nitrogen, sleep tightrogen, don't let the bed bugs bitrogen.
- Fri Jan 20, 2017 6:42 pm
- Forum: Significant Figures
- Topic: Sig Figs
- Replies: 8
- Views: 3486
Sig Figs
Can anyone explain to me what sig figs are and how they work?
- Sun Jan 15, 2017 1:18 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Constant pressure and volume
- Replies: 1
- Views: 399
Re: Constant pressure and volume
Heat capacity is greater for a system with constant pressure because more heat needs to be added to that type of system to be able to get the increase in temperature when compared to a system with constant volume.