phy chem Flashcards
The number of intensive variables that must be defined to determine the state of the system
Gibbs phase rule
two variables
extensive and intensive
dependent on quantity
extensive
not dependent on quantity
intensive
knowing all variables of a system
state
system in which the composition of all the phases can be expressed in terms of two substance
two component system
easy to melt
eutectic
a solid solution of two component system which has the lowest freezing point of all possible mixtures of the components
eutectic mixture
two classical statements of second law of thermo
clausius statement and kelvin-plank statement
it is impossible for any system in such a way that the sole result would be and energy transfer by heat from a cooler to a hotter body
clausius statement
it is impossible for any system to operate in a thermodynamic cycle and deliver a net amount of energy by work to its sorroundings while receiving energy by heat transfer from a single reservoir.
kelvin-planck statement
states that processes occur in a certain direction, not in just any direction
second law of thermodynamics
is the degree of disorder
entropy
matter changes from a more ordered to less ordered state
entropy
does not depend on the path taken to reach that specific value
state function
