Entropy: Embrace the Chaos!

What is entropy a measure of in the universe?

• Order

• Disorder

• Energy

• Temperature

Why is maintaining order locally a challenge?

• It requires no energy

• It decreases global disorder

• It increases global disorder

• It is a natural process

What does 'spontaneous' mean in thermodynamics?

• Slow reaction

• Fast reaction

• Occurs without external energy

• Requires external energy

Which reaction is an example of an entropy-driven process?

• Barium hydroxide and ammonium chloride reaction

• Combustion of wood

• Melting of ice

• Photosynthesis

What does the Gibbs free energy equation predict?

• Reaction temperature

• Reaction spontaneity

• Reaction speed

• Reaction pressure

What does the equation ΔG = ΔH – TΔS represent?

• The balance of mass

• The balance of enthalpy and entropy

• The balance of temperature

• The balance of energy

How can a reaction be spontaneous even if it absorbs heat?

• By increasing pressure

• By decreasing entropy

• By increasing entropy

• By decreasing temperature

What determines if a reaction is enthalpy-driven or entropy-driven?

• The magnitude of temperature

• The speed of the reaction

• The magnitude of pressure

• The relative magnitudes of enthalpy and entropy changes

Why are entropy and Gibbs free energy considered state functions?

• They depend on the amount of energy input

• They depend on the speed of the reaction

• They depend on initial and final states only

• They depend on the reaction pathway

What is a common misconception about spontaneous reactions?

• They always release heat

• They always absorb heat

• They always require a catalyst

• They always occur quickly

Tags

NGSS.HS-PS1-5