0th Law of Thermodynamics

0th law: If a body, A, is in thermal equilibrium with a second body, B, and that body is in thermal equilibrium with a third body, C, then A and C are in thermal equilibrium.
If two bodies/systems are in thermal equilibrium with one another, it means they are at the same temperature!

Thermal equilibrium: When two substances are in physical contact and exchange no heat energy with one another.

Temperature: A measure of the average kinetic energy of the particles in a sample of matter

Increasing the temperature means that average kinetic energy of the particles will (increase/decrease) ________.

Photo by CNS Openstax / CC BY

Extra Practice

Thermodynamics: Entropy Calculations

Using the following data, calculate the standard entropy of the reaction shown below. Enter your answer in units of J / (mol*K)

$2\ Al_{(s)}+3\ ZnO_{(s)}\rightarrow Al_2O_{3(s)}+3Zn_{(s)}$

$S^o(Al_{(s)})=28.3\ J\ mol^{-1}K^{-1}$

Thermodynamics: Entropy Calculations

Using the following data, calculate the standard entropy of the reaction shown below. Enter your answer in units of J / (mol*K)

$2\ Al_{(s)}+3\ ZnO_{(s)}\rightarrow Al_2O_{3(s)}+3Zn_{(s)}$

$S^o(Al_{(s)})=28.3\ J\ mol^{-1}K^{-1}$