IM LLI Calculate the standard enthalpy of reaction, AHn, of each of the given acid-base neutralization reactions involving the strong UXI base KOH. The standard enthalpy of formation data are provided. Compound or Ion Standard Enthalpy of Formation (kJ/mol) KOH(aq) -482.4 -285.8 (DO’H -98.4 KCIO,(aq) (be) OIDH -349.5 -121.0 (be)1 KBr(aq) -372.1 NH† (aq) -132.5 -80.3 NH, (aq) K*(aq) -251.2 HCIO, (aq)+KOH(aq) KCIO, (aq) + H,O(1) kJ/mol AHxn %3D = UXHV HBr(aq)+KOH(aq) → KBr(aq) + H,O(1) MacBook Pro Q Search or enter website name & delete $ 7. 081 5. 3. 4. P. R. K H. B. gE command option MOSISO R HBr(aq)+KOH(aq)→ KBr(aq) + H,O(1) %3D = "HV kJ/mol NH† (aq)+KOH(aq) NH, (aq) + K*(aq) + H,O(1) AH: Ixn %3D kJ/mol Based on theAHixn values, what is the most likely conclusion about the strength of the acids? O HCIO, (aq), HBr(aq), and NH (aq) are all strong acids. O HCIO, (aq), HBr(aq), and NH (aq) are all weak acids. O HCIO, (aq) and HBr(aq) are strong acids, and NH (aq) is a weak acid. O HC1O, (aq) and HBr(aq) are weak acids, and NH (aq) is a strong acid. MacBook Pro Q Search or enter website name 23 & 24 3. 4. 5. 6. 7. 00 6. dele P. H. K. 15 M B. gE MOSISO command uondo
Thermochemistry
Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.
Exergonic Reaction
The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.
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