Thermodynamics

Thermochemistry is the study of heat and its relation to chemical reactions.

Review enthalpy here

New Thermochemistry Vocabulary

Entropy (S): quantitative measurement of disorder

• • ΔS < 0: decreasing disorder

  • ΔS > 0: increasing disorder

Gibbs Free Energy (ΔG): favorability/spontaneity

• • ΔG < 0: FAVORABLE; spontaneous; the reaction releases energy; proceeds without the input of energy

  • ΔG> 0: NOT FAVORABLE; not spontaneous; requires energy to proceed

  • REMEMBER when looking at our definition of spontaneous google reads “performed or occurring as a result of a sudden inner impulse or inclination and without premeditation or external stimulus.” Do not think of this as a random occurrence, but the favorability to happen without the input of energy

Key Thermochemistry Equation

What is entropy? (5:19)