3 hours PAG3 Enthalpy Main chemical ideas: dissolving and – determination. associated enthalpy changes The storyline begins by looking at how the oceans Experiments involving Accurate use of the following will be have been and are enthalpy changes of required: hydrated ions, enthalpy change of surveyed, and what we solution. solution (solH) , lattice enthalpy (LEH), know about their enthalpy change of hydration of ions (hydH) Techniques and composition. This leads into procedures for measuring Solubility: Intermolecular ion–dipole a discussion of the solution the energy transferred in bonds and ionic bonds should be considered. of ionic solids, focusing on enthalpy experiments Specific details of hydrogen bonding and the the energy changes (HSW 4). physics properties of water is no longer involved. required. Lattice enthalpy: Defined as an exothermic quantity.The greater the charge density of the ion, the greater the electrostatic attraction and the more exothermic the lattice enthalpy. The greater the attraction of water molecules and the more exothermic the hydration enthalpy Dependence of lattice enthalpy and enthalpy changes of hydration on charge density of ions is new content. can be found on websites such as .
The storyline begins by looking at how the oceans have been and are surveyed, and what we know about their composition. This leads into a discussion of the solution of ionic solids, focusing on the energy changes involved. 3 hours PAG3 – Enthalpy determination. Experiments involving enthalpy changes of solution. Techniques and procedures for measuring the energy transferred in enthalpy experiments (HSW 4). Main chemical ideas: dissolving and associated enthalpy changes Accurate use of the following will be required: hydrated ions, enthalpy change of solution (solH) , lattice enthalpy (LEH), enthalpy change of hydration of ions (hydH) Solubility: Intermolecular ion–dipole bonds and ionic bonds should be considered. Specific details of hydrogen bonding and the physics properties of water is no longer required. Lattice enthalpy: Defined as an exothermic quantity.The greater the charge density of the ion, the greater the electrostatic attraction and the more exothermic the lattice enthalpy. The greater the attraction of water molecules and the more exothermic the hydration enthalpy Dependence of lattice enthalpy and enthalpy changes of hydration on charge density of ions is new content. can be found on websites such as .