Richard Saam
Jun28-04, 12:10 PM
<jabberwocky><div class="vbmenu_control"><a href="jabberwocky:;" onClick="newWindow=window.open('','usenetCode','toolbar=no, location=no,scrollbars=yes,resizable=yes,status=no ,width=650,height=400'); newWindow.document.write('<HTML><HEAD><TITLE>Usenet ASCII</TITLE></HEAD><BODY topmargin=0 leftmargin=0 BGCOLOR=#F1F1F1><table border=0 width=625><td bgcolor=midnightblue><font color=#F1F1F1>This Usenet message\'s original ASCII form: </font></td></tr><tr><td width=449><br><br><font face=courier><UL><PRE>\n\n\nHi:\n\nAs is well known - Free energy (G) refers to the maximum amount of\nenergy free to do useful work. It is related to enthalpy (H),\ntemperature (T), and entropy (S) by :\n\ndelta G = delta H - T delta S\n\nFree energy is also a measure of spontaneity. Negative values of G\nindicate a spontaneous or forward (reactants make products) reaction.\nPositive values of G indicate a nonspontaneous or reverse (products make\nreactants)system. If G = 0, the system is in equilibrium, where there is\nno forward or reverse reaction. At equilibrium, the composition of the\nsystem (amount of products and reactants) is constant.\n\nNow in the context of chirality, I believe it has been experimentally\nproven that there is a difference in entropy between separate\nenantomeric forms and the racemic mixture of these two forms and this\ncan quantitatively be expressed in terms of entropic mixing.\n\ndelta S = - R summation Xi ln Xi\n\nwhere Xi whole be enantomeric chiral forms.\n\nI am wondering if such is the reason for the predominance of chiral\nforms in biological entities (plants, fungi, insects and man). The\nenantomeric chiral form provides a shift in entropy and the\ncorresponding negative free energy for life to proceed in the background\nof all things going in increasing entropy direction.\n\nJust looking for some thoughts in this matter.\n\nRichard Saam\n\n</UL></PRE></font></td></tr></table></BODY><HTML>');"> <IMG SRC=/images/buttons/ip.gif BORDER=0 ALIGN=CENTER ALT="View this Usenet post in original ASCII form"> View this Usenet post in original ASCII form </a></div><P></jabberwocky>Hi:
As is well known - Free energy (G) refers to the maximum amount of
energy free to do useful work. It is related to enthalpy (H),
temperature (T), and entropy (S) by :
\delta G = \delta H - T \delta S
Free energy is also a measure of spontaneity. Negative values of G
indicate a spontaneous or forward (reactants make products) reaction.
Positive values of G indicate a nonspontaneous or reverse (products make
reactants)system. If G = 0, the system is in equilibrium, where there is
no forward or reverse reaction. At equilibrium, the composition of the
system (amount of products and reactants) is constant.
Now in the context of chirality, I believe it has been experimentally
proven that there is a difference in entropy between separate
enantomeric forms and the racemic mixture of these two forms and this
can quantitatively be expressed in terms of entropic mixing.
\delta S = - R[/itex] summation [itex]\Xi ln \Xi
where \Xi whole be enantomeric chiral forms.
I am wondering if such is the reason for the predominance of chiral
forms in biological entities (plants, fungi, insects and man). The
enantomeric chiral form provides a shift in entropy and the
corresponding negative free energy for life to proceed in the background
of all things going in increasing entropy direction.
Just looking for some thoughts in this matter.
Richard Saam
As is well known - Free energy (G) refers to the maximum amount of
energy free to do useful work. It is related to enthalpy (H),
temperature (T), and entropy (S) by :
\delta G = \delta H - T \delta S
Free energy is also a measure of spontaneity. Negative values of G
indicate a spontaneous or forward (reactants make products) reaction.
Positive values of G indicate a nonspontaneous or reverse (products make
reactants)system. If G = 0, the system is in equilibrium, where there is
no forward or reverse reaction. At equilibrium, the composition of the
system (amount of products and reactants) is constant.
Now in the context of chirality, I believe it has been experimentally
proven that there is a difference in entropy between separate
enantomeric forms and the racemic mixture of these two forms and this
can quantitatively be expressed in terms of entropic mixing.
\delta S = - R[/itex] summation [itex]\Xi ln \Xi
where \Xi whole be enantomeric chiral forms.
I am wondering if such is the reason for the predominance of chiral
forms in biological entities (plants, fungi, insects and man). The
enantomeric chiral form provides a shift in entropy and the
corresponding negative free energy for life to proceed in the background
of all things going in increasing entropy direction.
Just looking for some thoughts in this matter.
Richard Saam