What is Entropy ?

A thermodynamic (energy) function that describes the degree of randomness or probability

• Enthalpy

• Entropy

• Gibbs Free Energy

• Spontaneity

As a state function, entropy change depends

• A) only on the initial and final states

• B) not on how the change occurs

• C) Both Option A & B

• D) None

Predict the entropy change and its spontaniety

• ΔS = +ve and non spontaneous

• ΔS = -ve and spontaneous

• ΔS = -ve and non spontaneous

• ΔS = +ve and spontaneous

Entropy increases from solid, liquid to gas. Why?

• Molecular disorder increases
• Molecular randomness decreases
• Molecules are more energetic
• Molecules are more reactive

Entropy increases from solid, liquid to gas. Why?

• Molecular disorder increases

• Molecules increase in number from solid to gas

• Molecules are heavier in solid

• Molecules are more reactive

At what temperature would a given reaction become spontaneous if ΔH =+119kJ and ΔS=+263J/K.mol

• 452 K

• -2210 K

• 382 K

• -363 K

Entropy is a measure of

• accuracy

• precision

• the disorder of a system

• the attraction of a nucleus for an electron

what is the definition of "laws of thermodynamics"

Your enthalpy is high and negative but your entropy is also negative. What type of temperature would you want to get a spontaneous reaction?

• low

• high

Entropy increases from solid, liquid to gas. Why?

• Molecular disorder increases
• Molecular randomness decreases
• Molecules are more energetic
• Molecules are more reactive