A) calculate δh o fus and δs o fus for sodium metal and determine the melting temperature of sodium. δh o fus kj/mol δs o fus j/k · mol tmelt °c
(b) calculate δh o vap and δs o vap for sodium metal and determine the boiling temperature of sodium. δh o vap kj/mol δs o vap j/k · mol tboil °c

Which best describes the activation energy of a chemical reaction? a. the combined energy of all the reactants b. the amount of energy required for a reaction to occur c. the difference in energy between products and reactants d. the potential energy stored in the bonds of reactants and products