Quick questions on Chemical energetics, Hess's law and Gibbs free energy: Singapore A-Level H2 Chemistry

All "standard" values are quoted at $298$ K and $1$ bar, per mole, with elements in their standard states.

A Born-Haber cycle is a Hess cycle for an ionic compound that links its enthalpy of formation to atomisation, ionisation energy, electron affinity, and lattice energy. Rearranging the cycle gives the lattice energy, which cannot be measured directly:

Entropy $S$ measures the disorder, or number of ways energy and particles can be arranged. It increases when: solids melt or dissolve, liquids vaporise, the number of gas molecules increases, or temperature rises.

Define the standard enthalpy change of formation. [1 mark]

Using $\Delta H_f$ values $\text{CO}_2 = -394$, $\text{H}_2\text{O} = -286$, $\text{C}_2\text{H}_5\text{OH} = -278$ (kJ per mol), find $\Delta H_c$ of ethanol. ($\text{C}_2\text{H}_5\text{OH} + 3\text{O}_2 \rightarrow 2\text{CO}_2 + 3\text{H}_2\text{O}$.) [3 marks]

A reaction has $\Delta H = -90$ kJ per mol and $\Delta S = -200$ J per K per mol. State whether it is feasible at $298$ K. [3 marks]