Embedded Files
What is Entropy
What is Entropy
Entropy denoted by the symbol S is the measure of disorder in a system. The second law of thermodynamics states that Entropy overall will always increase. When chemicals become more random and less ordered entropy increases. Overtime Energy will naturally spread out and dissipate rather than concentrate in a single area.
Entropy and States of Matter
Entropy and States of Matter
Solids are the most orderly state which matter can exist in, and gases the least orderly state.
Gibbs Free Energy
Gibbs Free Energy
Gibbs free energy (ΔG) is the measure of work that can be done by a system. It is useful to determine whether a reaction will be spontaneous (occur naturally on its own) or non-spontaneous (require and input of energy to occur).
If the change in Gibbs free energy is negative the reaction is spontaneous.
If the change in Gibbs free energy is positive the reaction is non-spontaneous.
Gibbs free energy can be calculated by the following equation:
ΔG = ΔH - TΔS
ΔH = change in enthalpy (usually with units of kJ/mol)
T = temperature in kelvin (K)
ΔS = change in enthalpy (usually J/K)
Page updated
Google Sites
Report abuse