Problem 7.3 Solid silver has a density of 9.3 g/cm³, a liquid-solid surface energy of 1.8 × 10-4 J/cm², and an enthalpy of melting of -11.3 kJ/mol. Given that silver has a bulk melting point of 962°C, calculate the estimated melting point of a silver nanoparticle with a radius of 7.0 nm.