entropy and free energy
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12 Terms
entropy
A measure of the dispersal of energy in a system. Represented by the symbol S
what has the higest entropy
Gases, solutions and the more gas particles have the most entropy
calculating entropy
△S (JK^-1mol^-1) = Sproducts - Sreactants
S
standard entropy. The entropy of one mole of a substance measured under standard conditions
free energy
A measure used to predict wether a reaction is feasilble
feasible reaction
A reaction that once started will carry on to completion without any energy being supplied to it
what free energy value make a reaction feasible
0 or negative
how to calculate free energy change
△G = △H (Jmol^-1) - (T (K) x △S (JK^-1mol^-1) )
How to find the temperature of a feasible reaction (when G=0)
T (K) = △H/△S
degrees to kelvin
add 273
why would a reaction not take place even if its feasible
the rate of reaction is slow or the activation energy is high
how does the equation for △G releate the equation y=mx+c
△S=-m △H=y-intercept T=x
