Exam 18: Entropy, Free Energy, and Equilibrium

What is the change in entropy for the vaporization of 18 g of H₂O at 100°C? At this temperature, the molar enthalpy of vaporization for water is 44.0 kJ/mol.

For a given reaction, a change in the temperature may result in a change in the sign of ΔG.

A negative sign for ΔG indicates that, at constant T and P,

Which is a statement of the third law of thermodynamics?

For the following process, which is true?

Which statement is correct?

How many types of rotations does a diatomic molecule exhibit?

A spontaneous endothermic reaction always

Which has the largest entropy?

All elements in their standard state have standard entropies of formation equal to zero.

Predict the sign of ΔS for the reaction O₂(g) → 2O(g).

Below are energy level diagrams for two different atoms. Based on the diagrams, which atom has the larger standard molar entropy at T = 298 K?

Which is the thermodynamic condition for a spontaneous process at constant T and P?

What is ΔS° at 298 K for the following reaction? Fe₂O₃(s) + 3CO(g) → 3CO₂(g) + 2Fe(s)

Which reaction has the largest ΔS°?

How many types of rotations does a bent triatomic molecule exhibit?

Which is a statement of the second law of thermodynamics?

If a certain process has ΔS_univ > 0 at 25°C, the process may be described as

ΔS_universe > 0 is the general condition for a ________ process.

Nitric oxide reacts with chlorine to form NOCl. 2NO(g) + Cl₂(g) → 2NOCl(g) What is ΔG°_rxn for this reaction at 550. K?