Why is it for dS in calculations for changes in temperature and volume the final state is always in the numerator of the natural log function {ie. ln(V2/V1) or ln (T2/T1)}
but for pressure the equation is dS = nRln(P1/P2)?
Search found 14 matches
- Sat Mar 12, 2016 1:05 pm
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: Entropy for Changes in Pressure
- Replies: 1
- Views: 324
- Fri Feb 26, 2016 1:24 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: effect of Temperature
- Replies: 1
- Views: 300
effect of Temperature
Problem 15.65 For the reversible, one step reaction of 2A ⇌ B + C with the forward rate constant for the formation of B being 265 L/mol/min and reverse rate constant 392 L/mol/min. When there is an increase in the temperature of the reaction, why do we expect the rate of the forward reaction to incr...
- Sat Feb 20, 2016 10:01 pm
- Forum: *Organic Reaction Mechanisms in General
- Topic: illustrating electron movement with arrows
- Replies: 1
- Views: 307
illustrating electron movement with arrows
The course reader states that the arrows the show e- source and the destination of the e-
Does this mean the base of the arrow always starts from a line representing a bond and ends at an atom?
Does this mean the base of the arrow always starts from a line representing a bond and ends at an atom?
- Wed Jan 20, 2016 8:44 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: Volume and Degeneracy Relationship
- Replies: 1
- Views: 256
Volume and Degeneracy Relationship
Why are the volume and degeneracy ratios in isothermal expansions interchangeable? (i.e. p34 of the course reader). Does this mean the actual quantified values of V and W are also interchangeable?
- Sat Jan 09, 2016 6:57 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Units When Calculating Enthalpy Using Hess's Law
- Replies: 1
- Views: 362
Units When Calculating Enthalpy Using Hess's Law
When you're using Hess's Law to find enthalpy, is it imperative the units are kJ/mol? Or can you calculate using just with kJ and then find the enthalpy per mol afterwards?
- Sat Dec 05, 2015 3:36 pm
- Forum: Naming
- Topic: the difference between bi- and di- prefixes?
- Replies: 2
- Views: 14896
the difference between bi- and di- prefixes?
How do you know when to use either bi- or di-? Is bi- ever used at all in naming coordination compounds? I realize that ethylenediamine and dihydrate both use di- but i can't find any examples for the use of the prefix bi-
- Sun Nov 29, 2015 7:03 pm
- Forum: Photoelectric Effect
- Topic: Photoelectric Effect Example - 2015 Fall Midterm Q3
- Replies: 1
- Views: 326
- Wed Nov 25, 2015 8:16 pm
- Forum: Photoelectric Effect
- Topic: Video: Photoelectric Effect Example
- Replies: 3
- Views: 615
Re: Video: Photoelectric Effect Example
Fall Midterm 2015. Q3 Video
- Sun Nov 15, 2015 10:14 pm
- Forum: Naming
- Topic: Oxidations Numbers of Central Atom
- Replies: 1
- Views: 364
Oxidations Numbers of Central Atom
How do we determine which oxidation state is being used for elements with multiple oxidation states?
- Fri Nov 06, 2015 8:12 pm
- Forum: Lewis Structures
- Topic: Sulfur Dioxide Formal Charges
- Replies: 3
- Views: 1529
Sulfur Dioxide Formal Charges
Why does the accepted SO2 Lewis structure have one oxygen bonded to the sulfur with a double bond and the other oxygen bonded to the central atom with a singe bond? Wouldn't the structure be more stable with both bonds being doubles and therefore the formal charge on each atom being zero?
- Mon Oct 26, 2015 11:12 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Determining Polar and Non Polar Molecules
- Replies: 2
- Views: 484
Re: Determining Polar and Non Polar Molecules
In the Course Reader it says "A polar molecule must have POLAR BONDS with DIPOLES that do not cancel"
Does that mean that molecules of identical atoms (i.e. O3) cannot be polar even though they will have a preferential interaction with a cation or anion?
Does that mean that molecules of identical atoms (i.e. O3) cannot be polar even though they will have a preferential interaction with a cation or anion?
- Sat Oct 24, 2015 8:21 pm
- Forum: Hybridization
- Topic: Quick Clarification on Notation
- Replies: 1
- Views: 300
Re: Quick Clarification on Notation
Dr Lavelle mentioned this in lecture on Friday. He said either notation (with d first or last) is acceptable
- Mon Oct 12, 2015 5:14 pm
- Forum: Properties of Electrons
- Topic: Atomic Spectra
- Replies: 1
- Views: 343
Atomic Spectra
How do you know the principle quantum number "n" from a given wavelength?
- Fri Oct 09, 2015 10:46 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Shells & Orbitals
- Replies: 3
- Views: 674
Shells & Orbitals
What is the difference between the shells of an atom and orbitals? Can the terms be used interchangeably or do they differ and one exists as a subset of the other?