Entropy & Gibbs

What is the definition of entropy?

• Measure of disorder in a system

• Internal energy stored within a system

• Number of possible arrangements of particles and their energies in a system

• The change in number of molecules and their energies in a system

If any, is the entropy change of this reaction positive or negative?

• Negative

• No Change

• Positive

Tags

NGSS.HS-PS1-4

How does increasing temperature affect entropy and why?

• Entropy decreases as kinetic energy decreases, so particles are more stable

• Entropy increases as kinetic energy increases, so energy arrangements of particles increase

• Entropy decreases as kinetic energy increases, so level of disorder decreases

• Entropy increases as kinetic energy decreases, so rate of reaction decreases

What is the formula for Gibbs free energy?

• G = H * TS

• G = H + TS
• G = H / TS
• G = H - TS

What is the standard unit for Gibbs free energy change?

• KJ/mol

• N/m

• J/mol

• mol/dm^3

What is the standard unit for change in entropy?

• J/mol

• J/K/mol

• Pa/s

• W/K

What is the standard unit for change in enthalpy?

• J/dm^3

• N/s

• J/mol

• J/K

How does Gibbs free energy change tell us a reaction is feasible?

• When G < 0

• When G > 0

When change in entropy is negative, how does increase in temperature affect the reaction?

• Reaction becomes less feasible

• Reaction becomes more feasible

• No change

If number of gaseous molecules decreases after the reaction, what happens to entropy?

• Increases

• Decreases

• No change