Hess Law Lab

Objective To determine of arouse ups from three exothermic fightions and ask the Hess Law Summary Based on this audition, we have training three related exothermic receptions involving atomic number 11 hydroxide. The first reception (Part A), steadfast atomic number 11 hydroxide give break into body of water. The heat kick upstairs by this reception (?H1) and this called as the heat of stem of square(p) NaOH. From the test we have managed to intractable that ?H1 = -41.84 KJ/mol In the morsel reaction (Part B), an aqueous solution of NaOH is allowed to react with an aqueous solution of HCl. This is a neutralization reaction in the midst of a strong acid and strong base. Therefore the heat of reaction (?H2) is called as the heat of neutralization of HCl and NaOH solutions. The ?H2 calculated from this experiment is -6.6944KJ/mol. This is because the total heat changes when 1 mole of H+ ions from an acid (HCl) reacts with one mole o f OH- from an alkali (NaOH) to form one mole of water molecules nether the stated conditions of the experiment. In the final reaction of the experiment (Part C), substantiality NaOH willing react with an aqueous solution of HCl. This reaction is in like manner the combination of the first and two reactions. The solid NaOH will dissociate into its ions as it dissolves in the acid solution which is thence neutralized by the acid solution. Thus the heat of the reaction (?H3) is utter be equal to (?H1+?H2). It is called the heat of solution of solid NaOH. From our numeration it known that ?H3 is -58.6 kJ/mol. When ionic solid dissolves in water, heat was librated. chemical reaction 1: Dissolving solid atomic number 11 hydroxide in water. NaOH(s) ---> Na+(aq) + OH-(aq) + heat Reaction 2: Reaction of atomic number 11 hydroxide solution with dilute hydrochloric acid. Na+(aq) + OH-(aq) + H+(aq) + Cl-(aq) ---> Na+(aq) + Cl-(aq) + H2O Reac! tion 3: Reaction of solid sodium hydroxide with dilute hydrochloric acid solution....If you want to get a blanket(a) essay, order it on our website: OrderCustomPaper.com

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