CHEM 1A03 Chapter Notes - Chapter 8: Bond-Dissociation Energy, Sodium Hydride, Joule

• School: McMaster University
• Department: Chemistry
• Course: CHEM 1A03
• Professor: Adam Hitchcock

Document Summary

All of the energy that enters the system goes into melting or boiling water without changing the temperature. This enthalpy is know as the latent, or hidden, heat of fusion. 6. 01 kj/mol for melting of ice at 273k. We can calculate the enthalpy required to convert solids to liquids or gases or vice versa (using - molar heats) Bond dissociation energy refers to the amount of energy required to break 1 mole bonds into the gas phase. Enthalpy of reaction is equal to enthalpy of bond energies of reactants - bond energies of the products. Calculate enthalpy of reaction using enthalpy of formation. > the enthalpy change that occurs in the formation of one mole of a substance in its standard state from the reference forms if its constituent elements. > reference form = most stab;e from of an element at 273k and 1 bar of pressure (ex; o2 is gas, br2 is liquid, lithium is solid)