The compound that would have the most exothermic lattice energy is NaF. Option A.
Lattice energy is exothermic. Lattice energy is the energy released when gaseous cations and anions associate with each other to form a solid crystalline ionic solid. When paraffin burns in a flame, it reacts with oxygen to produce carbon dioxide and water.
This reaction is indeed exothermic as it releases heat into the atmosphere with the help of other products. The amount of heat released depends on the chemical reaction between hydrocarbons and oxygen. A reaction is exothermic if the sum of the enthalpies of the reactants is greater than the enthalpy of the products. If the enthalpy on the product side is large, the reaction is endothermic.
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