Thermo Dynamics

Question 1

First law of thermo dynamics

Answer 1

Energy is not created or destroyed; it only changed forms

Question 2

Second law of thermo dynamics

Answer 2

The entropy (disorder) of the universe is always increasing

Question 3

Example of entropy

Answer 3

More energy dispersal = more entropy

Question 4

Why does heat flow from hot to cold?

Answer 4

Entropy

Question 5

Third law of thermodynamics

Answer 5

A perfectly crystalline solid at absolute zero has an entropy of zero

Question 6

Fórmula for entropy

Answer 6

Entropy = S (Jules/Kelvin)

It is not an measure of energy itself, but of how energy is dispersed within a system

Question 7

Gibbs free energy (G)

Answer 7

Tells us about the spontaneity of a process (meaning it will happen on it’s own)

G = H - TS

Enthalpy (H) measure of energy

G = change in energy - change in entropy (S) and temperature
Negative means spontaneous, positive is no spontaneous