Chapter 6:Chemical Equilibrium Flashcards
the equ composition corresponds to a
minimum in the gibbs energy plotted against the extent of reaction (is the gibbs reaction energy)
the direction of spontaneous change
tends towrd lower values of gibbs
extent of reaction (xi)
dimension of amount of substance
the gibbs reaction energy is
is the difference between the chemical potential of the reactants and products at the current compostion of the reaction mixture
if the gibbs reaction energy is less than zero
the forward reaction is spontaneous
is called exergonic(producing)
can be used to drive another process
when the gibbs reaction energy is greater than zero
the reverse reaction is zero
endergonic (work consuming)
when the gibbs reaction energy is zero
the reaction is at equ.
the gibbs energy stems from
the mixing of two gases
if the standard gibbs reaction energy is greater than zero and the equ. constant is less than 1
at equ. the partial pressure of A exceeds that of B, meaning the reactant A is favored in equ.
when the standard gibbs reaction energy is less than zero and the equ. constant is grater than 1
at equ, the partial pressure os B exceeds that of A, meaning the product B is favoured in the equ.
a system at equ, when subjected to a disturbance
respons in a way that tends to minimize the effect of the disturbance
Le chatelier’s principle
the equ. constant and ___ are indepent of pressure
the standard gibs reaction energy
at a given temperature the equ. constant
is constant
the parital pressure of a perfect gas is
the pressure it would exert if it were alone in the container
wit hexo reaction an increases in temp favors
reactants
