$word_{count}$: 200

Core equations: $delta_U$ = q + w (first law). H = U + PV. $delta_H$ = $delta_U$ + $delta_{ngas}$RT. G = H - TS. $delta_G$ = $delta_H$ - T$delta_S$. delta_G_{standard} = -RT ln K = -$nFE_{standard}$. Process-specific work: free expansion w = 0; constant P: w = -$P_{ext}$$delta_V$; reversible isothermal: w = -nRT ln$\frac{V2}{V1}$; adiabatic: w = nCv$delta_T$; isochoric: w = 0. Heat capacity: Cp - Cv = R (ideal gas). Entropy: $delta_S$ = $\frac{q_rev}{T}$ = nR ln$\frac{V2}{V1}$ for isothermal. Kirchhoff: $delta_H$(T2) = $delta_H$(T1) + $delta_{Cp}$(T2-T1). Hess's law: $delta_H$ = sum($delta_{Hf}$ products) - sum($delta_{Hf}$ reactants) = sum(BE broken) - sum(BE formed) = sum($delta_{Hc}$ reactants) - sum($delta_{Hc}$ products). Born-Haber: $delta_{Hf}$ = delta_H_{sub} + IE + 1/2 D + EA - U. Trouton's rule: delta_S_{vap} ≈ 85-88 $\frac{J}{mol.K}$. Key values: R = 8.314 $\frac{J}{mol.K}$, 1 L.atm = 101.325 J, 1 cal = 4.184 J, F = 96485 C/mol.