Chemistry - 9.1 - Intro to Entropy

What is Entropy?

The dispersal of matter or energy in a sample of matter.

What happens when matter or energy becomes more dispersed?

Increase in entropy

How does entropy increase between the states?

Solid < Liquid < Gas

What happens to the entropy of a gas when its volume increases at constant temperature?

The entropy of a gas increases.

How does the total number of moles of gas-phase products compared to gas-phase reactants affect entropy?

Entropy generally increases.

How does the temperature of a gaseous system affect its entropy?

The entropy of a gaseous system increases.

What is Delta S?

The change in entropy.

In what measurement is entropy often expressed in?

Joules per kelvin (rather than kilojoules per kelvin)