The lattice enthalpy of M g B r 2 ( s ) has to be determined. Concept Introduction: Enthalpy of sublimation: The heat required to change the state of one mole of a substance from solid state to gaseous state at a given combination of temperature and pressure is called as enthalpy of sublimation. Ionization Energy: The amount of energy which is required to remove the electron from its outermost orbital is called ionization energy. Dissociation Energy: The amount of energy needed to break apart one mole of covalently bonded gases into a pair of atoms is called as the dissociation energy. Electron Affinity : The amount of energy released when an electron is added to a neutral atom or molecule in the gaseous state to form a negative ion is called as electron affinity. Lattice Energy: The energy required to break apart an ionic solid and convert its component atoms into gaseous ions is called lattice energy. The other definition is the energy released when gaseous ions bind to form an ionic solid is called as lattice energy. Enthalpy of formation: The change in enthalpy during the formation of 1 mole of the substance from its constituent elements, with all substances in their standard states is called as the standard enthalpy of formation. Enthalpy of vaporization: The amount of energy that must be added to a liquid substance, to transform it into a gaseous substance is called as the enthalpy of vaporization.

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Chapter 15, Problem 15C.5BE

Interpretation Introduction

Interpretation:

The lattice enthalpy of MgBr2(s) has to be determined.

Concept Introduction:

Enthalpy of sublimation:

The heat required to change the state of one mole of a substance from solid state to gaseous state at a given combination of temperature and pressure is called as enthalpy of sublimation.

Ionization Energy:

The amount of energy which is required to remove the electron from its outermost orbital is called ionization energy.

Dissociation Energy:

The amount of energy needed to break apart one mole of covalently bonded gases into a pair of atoms is called as the dissociation energy.

Electron Affinity:

The amount of energy released when an electron is added to a neutral atom or molecule in the gaseous state to form a negative ion is called as electron affinity.

Lattice Energy:

The energy required to break apart an ionic solid and convert its component atoms into gaseous ions is called lattice energy.

The other definition is the energy released when gaseous ions bind to form an ionic solid is called as lattice energy.

Enthalpy of formation:

The change in enthalpy during the formation of 1 mole of the substance from its constituent elements, with all substances in their standard states is called as the standard enthalpy of formation.

Enthalpy of vaporization:

The amount of energy that must be added to a liquid substance, to transform it into a gaseous substance is called as the enthalpy of vaporization.

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