19. Chemical Thermodynamics

For the following reaction at 27 °C, calculate ∆S°_rxn, ∆S_surr, and ∆S_tot. Determine if reaction is favorable.

Fe₂O₃ (s) + 3 H₂ (g) → 2 Fe (s) + 3 H₂O (g) ∆H_rxn = 98.8 kJ

Find Δ_rS for the formation of CH₃Cl(g) from its elements in their standard states. standard thermodynamic quantities for selected substances at 25 °C.

Calculate δs∘rxn for the following reaction. The δs∘ for each species is shown below the reaction. C₂H₂(g) + 2 H₂(g) → C₂H₆(g) s∘(J/mol⋅K) 200.9 130.7 229.2

Calculate ∆S° for NH₃(g) + HCl(g) → NH₄Cl(s)

Calculate ∆S° for C₃H₄(g) + 2 H₂(g) → C₃H₈(g).

What is the S° of HgI₂(yellow) in J/mol-K?

What is ∆G° for the reaction CaO(s) + CO₂(g) → CaCO₃(s)?

What is the standard Gibbs free energy for the transformation of diamond to graphite at 298 K?