Entropy & Spontaneity (DP IB Chemistry: HL)

Which of the following conditions will mean a reaction is never feasible?

Ethene is produced according to the following gas-phase synthesis:

2C (s)  + 2H₂ (g) → C₂H₄ (g) 

Thermodynamic data for the components of this equilibrium are

The free energy change for this reaction at 298 K is:

Which statements are correct for the following reaction?

1.   The reaction will be feasible at high temperatures 
2.   The reaction will never be feasible 
3.   The reaction becomes more disordered

Which of the following equations is used when calculating the temperature, in Kelvin, at which a reaction becomes feasible if ΔH^Θ = x and ΔS^Θ = y.

The ΔG^ϴ_f values for the following substances are shown.

Which of the following is the correct calculation to determine ΔG^ϴ? 

4NH₃ (g) + 5O₂ (g) ⇌ 6H₂O (g) + 4NO (g)

Which row correctly describes a reaction that only occurs spontaneously at a low temperature?

Urea reacts with water to produce carbon dioxide and ammonia via the following reaction

CO(NH₂)₂ (aq) + H₂O (l) → CO₂ (g) + 2NH₃ (g)                    ΔH = 133 kJ mol^-1

Thermodynamic data for the components of this reaction are

At which of the following temperatures will this reaction become feasible? 

Which reaction occurs with the largest increase in entropy?

Which is correct for the reaction H₂O (g) → H₂O (l)?

Which factors will increase the entropy of this system?

CaCO₃ (s)  CaO (s) + CO₂ (g)

I.     Increasing the temperature without changing the volume of the container.

II.     Decreasing the concentration of the gas without changing the volume of the container.

III.     Increasing the pressure without changing the volume of the container.