Lattice energy Questions and Verified Answers | Passed | A+

Lattice energy : - The enthalpy change when 1 mole of ionic compound is formed from its gaseous ions under standard conditions - It is the energy given out when ions of opposite charges comes together to form an ionic lattice Lattice energy is endothermic or exothermic? : - It is always exothermic because bonds are being formed (ionic bond) between oppositely charged ions, not broken Equation showing the formation of NaCl lattice : - Na^+(g) + Cl^-(g) NaCl(s) The state of the oppositely charged ions before the lattice is formed 2 : - Gaseous state Since lattice energy will always be exothermic, what will the value of the enthalpy change be like? : - Always a negative value What does the negativity of the enthalpy change value tells us? : - The more negative the enthalpy change value, the more exothermic the reaction (reaction where lattice are form from its gaseous ions) - And the more exothermic the reaction, the stronger the ionic bonds that are formed between the oppositely charged ions, the more stable the ionic lattice will be with respect to its gaseous ions (with respect because the strength of the ionic bond form between the ions depends on the ions itself, how strongly it is attracted to eachother