Thermodynamics 3

what is the 3rd law of thermodynamics

the entropy of all pure crystalline solids at the absolute zero of temperature is zero

how do you calculate an entropy value at a given temprature

consider the various entropy changes as he temprature is raised from 0K

what two phase changes does the 3rd law of thermodynamics go under

melting

vaporisation

what system can take account of enthalpy change and entropy change

free energy

what is the gibbs free energy formula

G = H - TS

what is gibbs free energy

shows the balance between enthalpy and entropy terms in determing the direction of a process

whats the expression for standard state changes between products and reactants

triangleG = triangleH - TtriangleS

what will happen to the process if is the change in value of gibbs free energy is less than 0

it will occur

what will happen to the process if the chnage in value in free energy is greater than 0

process will occur in reverse direction

what will happen to the process if the chnage in value in free energy is 0

reversible

what is the value of the change in energy when a reaction is at equilibrium

0

what is chemical potential

the contribution that component makes to the overall free energy of a system

whats a simple definition for a pure material

what is an activity

enable us to quantify how the chemical potential of a pure substance changes when it becomes a component in a mixture

when temprature is increased what happens to the internal energy

also increases