Skip to main content
16 events
when toggle format what by license comment
Sep 19, 2020 at 0:01 history bumped CommunityBot This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
Jun 10, 2020 at 14:04 history edited CommunityBot
Commonmark migration
May 21, 2020 at 23:07 history bumped CommunityBot This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
Jan 22, 2020 at 23:01 history bumped CommunityBot This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
Sep 24, 2019 at 22:02 history bumped CommunityBot This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
May 27, 2019 at 22:01 history bumped CommunityBot This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
Apr 27, 2019 at 21:20 history edited andselisk CC BY-SA 4.0
added 65 characters in body; edited tags
Apr 27, 2019 at 17:01 history bumped CommunityBot This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
Mar 28, 2019 at 16:51 comment added parsa ahmadi We know norhing about molecular mechanism we are just provided that c reacting d will result in cd and c reacting with cd will result in e.
Mar 28, 2019 at 16:50 answer added parsa ahmadi timeline score: 1
Mar 28, 2019 at 16:25 history edited A.K. CC BY-SA 4.0
deleted 51 characters in body
Oct 28, 2016 at 7:23 history tweeted twitter.com/StackChemistry/status/791903171752947712
Oct 26, 2016 at 20:38 comment added porphyrin To comment on your particular reaction (a) if the rate quoted is true then this C+D represents the rate limiting step, i.e. slowest and this means that CD reacts with C more rapidly than D reacts with C, i.e. CD+C has a lower activation barrier. (b) Alignment has a very small effect compared to activation energy $\Delta E$ , look up Arrhenius equation $k=A.\exp(-\Delta E/(RT))$ where $A$ is rate constant at infinite temperature (or zero activation energy)
Oct 26, 2016 at 20:27 comment added porphyrin The rate law does not usually (i.e. almost never) indicate what the actual mechanism is. The only way to determine mechanism is by experiment. The classic example is $\ce{H2 +Br2 = 2HBr}$ which occurs via five recactions involving $\ce{H\cdot , Br\cdot}$ radicals with rate $\ce{d[HBr]/dt= a[H2][Br2]^{1/2}/(1+b[HBr]/c[Br_2])}$ where a, b, c are rate constants (or combinations thereof) of the mechanism.
Oct 25, 2016 at 23:33 comment added orthocresol Steric factors are not the only thing that controls the rate of each elementary step. Perhaps most crucially you have to look at the activation energy as well. That second step may have a smaller steric factor than the first step but that doesn't necessarily mean it's slower.
Oct 25, 2016 at 23:29 history asked Jack Pan CC BY-SA 3.0