2.2 Reaction Feasibility Flashcards
what are the conditions for the standard state of a substance to be in?
a pressure of 1 atmosphere
298 K
degree of entropy in solids and gases
solid - low entropy (disorder)
gas - high entropy (disorder)
degree of entropy at the melting point and boiling point
there is a rapid increase in entropy at MP
an even more rapid and larger entropy at BP
what is entropy affected by?
temperature
as temp increases, entropy increases
what happens when heat is released by a reaction to the surroundings?
entropy increases
what happens when heat is absorbed by a reaction from the surroundings?
entropy decreases
entropy value in a feasible reaction?
positive
what is required for a reaction to be feasible? (even under non-standard conditions)
the change in free energy must be negative
how do you predict reaction feasibility?
G<0 reaction is feasible
G=0 reaction is just feasible (equilibrium)
G>0 reaction is not feasible
what happens to a reversible reaction in terms of free energy?
it will proceed spontaneously until G=0