Search type Search syntax
Tags [tag]
Exact "words here"
Author user:1234
user:me (yours)
Score score:3 (3+)
score:0 (none)
Answers answers:3 (3+)
answers:0 (none)
isaccepted:yes
hasaccepted:no
inquestion:1234
Views views:250
Sections title:apples
body:"apples oranges"
URL url:"*.example.com"
Favorites infavorites:mine
infavorites:1234
Status closed:yes
duplicate:no
migrated:no
wiki:no
Types is:question
is:answer
Exclude -[tag]
-apples
For more details on advanced search visit our help page
Results tagged with Search options user 16088

The study of chemical systems using the laws and concepts of physics. This usually requires the techniques of thermodynamics, statistical mechanics and quantum mechanics.

3
votes
2answers
Was reviewing some of my physical chemistry lectures and attempted a a derivation of the unimolecular gas phase reaction using a calculation based on the RRK model (Rice-Ramsperger-Kassel), and ran in …
asked Sep 18 '16 by getafix
1
vote
The steady state approximation posits that after an initial induction periods, an interval during which the concentration of reaction intermediates rises from zero, and during major parts of the react …
answered Sep 24 '16 by getafix
1
vote
Short answer: It is not absolutely necessary, the theory and the results derived from it still hold at low particle concentrations but they cease to be meaningful. It is not so much a theoretical requ …
answered Oct 4 '16 by getafix
5
votes
1answer
This question is in reference to an answer I posted here yesterday. In it I derived the partition function for a harmonic oscillator as follows $$q = \sum_{j}e^{-\frac{\epsilon_j}{kT}}$$ For the ha …
asked Oct 18 '16 by getafix
4
votes
This answer expands upon my first comment: I am familiar with the version with $\Delta_{\text{vap}}H$, and in the derivation somewhere I remember that the Gibbs-Helmholtz equation is invoked and …
answered Oct 30 '16 by getafix
1
vote
Your derivation is obviously flawed, and unfortunately you reasoning doesn't make much sense to me either. You assume $U = q + w$ which is clearly not true; similarly $ \mathrm{d}w = -p \int \mathrm{ …
answered Sep 26 '16 by getafix
8
votes
1answer
We have, $$\theta = \frac{Kp_\mathrm a}{1+Kp_\mathrm a}$$ where, the fractional coverage $\theta$ is defined as the number of sites occupied by adsorbate $A$ over the total number of sites. $p_\mat …
asked Oct 29 '16 by getafix
1
vote
Hint: A general outline of what I think is the idea behind this problem/ This is a quick back of the envelope estimate: $$\ce{NaN3(s) -> Na(s) + 3/2N2(g)}$$ The reaction given above takes place, and …
answered Sep 26 '16 by getafix
6
votes
2answers
I understand that it is possible to cool a liquid past its freezing point, and still maintain its liquid state because crystallisation would not happen in the absence of a seed crystal. My question, …
asked Jun 6 '15 by getafix
4
votes
1answer
Estimate $\Delta_\mathrm{c}H^\circ(500\mathrm{~K})$ for methane by using the data given on the temperature dependence of heat capacities. $$\ce{CH4(g) + 2 O2(g) -> CO2(g) + 2H2O(g)}$$ My wor …
asked Oct 25 '15 by getafix
2
votes
As you are already aware, cathode rays are electron beams. You take evacuated glass tube, and add two electrodes on either end. Once you apply a sufficiently high voltage, a stream of electrons flows …
answered Oct 22 '16 by getafix
3
votes
Self Answer Additionally, I plotted $\frac{1}{V}$ and $\frac{1}{p}$, as suggested by @Chester Miller in the comments below, and indeed I get a straight line. A linear model fit was performed and …
answered Oct 31 '16 by getafix
4
votes
Short Answer The following equilibrium roughly represents what goes on during physisorption of a gases onto a a surface. $$\ce{Gas + Surface <=>[adsorption][desorption] Gas--Surface} $$ The effect …
answered Oct 18 '16 by getafix
15
votes
Preliminaries Consider $U = U(V,T, p)$. However, assuming that it is possible to write an equation of state of the form $p = f(V,T)$, I don't have to explicitly address the $p$ dependence of $U$, …
answered Sep 24 '16 by getafix
8
votes
Note: You can skip section I, and go straight to section II and/or the end of section III (specifically the conclusions subsection), if you are already familiar with the basic mathematical machinery/d …
answered Oct 25 '16 by getafix

15 30 50 per page