Bonding & Lewis Structures Notes - Student Notes & Practice Guide

Develop a model to illustrate that the release or absorption of energy from a chemical reaction system depends upon the changes in total bond energy. Emphasis is on the idea that a chemical reaction is a system that affects the energy change. Examples of models could include molecular-level drawings and diagrams of reactions, graphs showing the relative energies of reactants and products, and representations showing energy is conserved. Assessment does not include calculating the total bond energy changes during a chemical reaction from the bond energies of reactants and products.

Plan and conduct an investigation to gather evidence to compare the structure of substances at the bulk scale to infer the strength of electrical forces between particles. Emphasis is on understanding the strengths of forces between particles, not on naming specific intermolecular forces (such as dipole-dipole). Examples of particles could include ions, atoms, molecules, and networked materials (such as graphite). Examples of bulk properties of substances could include the melting point and boiling point, vapor pressure, and surface tension. Assessment does not include Raoult’s law calculations of vapor pressure.