Entropy and Gibbs Free Energy Review

Front

What does a negative Delta S indicate?

Back

Entropy decreases.

Front

What does a negative Delta G indicate?

Back

The reaction is spontaneous.

Tags

NGSS.HS-PS1-4

Front

Which quantity is always positive during a spontaneous process?

Back

ΔS univ (Universal entropy change).

Front

What direction do systems in nature tend to move towards?

Back

Lower energy and more disorder.

Front

Can spontaneous reactions be slow?

Back

Yes, spontaneous reactions may be extremely slow.

Front

What is entropy?

Back

A measure of the disorder or randomness in a system.

Tags

NGSS.HS-PS3-4

Front

What is Gibbs Free Energy?

Back

A thermodynamic potential that measures the maximum reversible work obtainable from a system at constant temperature and pressure.

Front

What is the relationship between Delta G and spontaneity?

Back

If Delta G is negative, the reaction is spontaneous; if positive, it is non-spontaneous.

Front

What does a positive Delta H indicate?

Back

The reaction is endothermic, absorbing heat.

Tags

NGSS.HS-PS3-1

Front

What does a negative Delta H indicate?

Back

The reaction is exothermic, releasing heat.

Tags

NGSS.HS-PS1-4