SPONTANEITY, EQUILIBRIUM,
AND ENERGY OF R EACTIONS
Finals
Week No.1 A Matter of Spontaneity
The entropy of the universe is always positive
as it continues to expand . He heavenly bodies
move farther away from each other, forming
galaxies and other star systems.
Big Idea:
Spontaneity of Chemical
Processes
Theme Focus:
Enthalpy, entropy, and Gibbs free
energy are indicators of the
spontaneity of a chemical
process.
1.Predict the spontaneity of a process
based on entropy
2.Determine whether entropy increases
or decreases if temperature, phase or
number of particles are changed.
3.Explain the second law of
thermodynamics and its significance
4.Use Gibbs free energy to determine the
direction of reaction
A Closer Look
Thermodynamics and Perpetual Motion
In the fifteenth century, Leonardo da Vinci (1452 -1519) drew several
sketches of a perpetual motion machine – a theoretical machine that turns
perpetually, thus producing work without any energy input. If ever
successfully invented, the machine was believed to solve all the energy
problems of the world. However, such machine would violate the laws of
thermodynamics.
• Strive to establish order in
everyday tasks
• Accept reasons when things do
not happen as planned
• Learn to adopt to any change
Seatwork No. 1 ( ¼ sheet of paper)
Date: Nov.3, 2022
Write five examples of
spontaneous processes
and five examples of non –
spontaneous processes
that you encounter
everyday.