Question

Extra Practice Question a (Critical Thinking) The diagram below presents a qualitative view of enthalpy Free, fated perticies solated Atoms chemical bonds of -Liquid Sold (s) moderate strength - Phase Changes inter-molecular interactons)Atoms joined by strong chemical bonds Chemical reactions Particles held together by strong İnterertions intra-molecular bonds between (a) Write the overall chemical equation for of formation from the relevant standard elemental state. (b) Based on the physical or chemical changes occurring in this formation reaction, state whether the standard molar enthalpy of formation, AP, for each chemical species is: Highly exothermic (Ac-100 kJ mot') * Moderately exothermic (-100 < Δ4P < 0 kJ mol') . 0, zero Moderately endothermic (0AH 100 kJ mol) Highly endothermic (AuH > 100 kJ mol') (c) Briefly explain your reasoning- what physical or chemical process is involved, and hence why Af has that magnitude. Chemical a. formation reaction c. explanation l2 (s) is already in standard state moderately Sublimation takes a moderate amount of endothermic, energy to overcome the intermolecular l2 (s) l2 (9) (+62 k.J/mol) attractions of the solid NaCI (s) Br2 (/) Brz (g) o (g) C(diamond)

Answer 1

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