Entropy

Question 1

What is entropy?

Answer 1

• The dispersal of energy within chemicals making up a chemical system
• the greater the entropy, the greater the disperse of energy and the greater the disorder in a system

Question 2

What are the units of entropy?

Answer 2

JK-1mol-1

Question 3

How does entropy change from solid, liquid and gas.

Answer 3

• solids have the smallest entropies, liquids have greater entropies and gasses have the greatest entropies
• increase in randomness, increase in dispersion and therefore greater entropy

Question 4

How does entropy change with the number of gaseous molecules?

Answer 4

• the more gaseous products, the increase in the spread of energy and therefore the greater the entropy

Question 5

How do you calculate change in S

Answer 5

Products - reactants
- always positive