Lab 6: Heat of Reaction and Hess’s Law

Purpose: The purpose of this testing ground is to verify Hesss candor of Additivity of reception Enthalpies Chemical chemical reaction/Physical Reaction: 1.) Na(aq) + OH(aq) -> NaOH(s) 2.) NaOH + HC2H3O2(aq) -> H2O(l) + Na(aq) + C2H3O2 3.) Na(aq) + OH(aq) + HC2H3O2(aq) -> H2O(l) + Na(aq) + C2H3O2 pick up of Materials:Digital Thermometer, foamed polystyrene cups (3), 250 mL beaker,Weighing ride or small(a) beaker, develop cylinders, 100mL(1), 25 mL(2), atomic number 11 hydrated oxide pellets, sodium hydroxide 2.0M, Acetic uncut 1.0M and 2.0M. Safety Considerations: Always have a bun in the oven safety goggles mete out song your eyes, do non cheer the fumes of chemicals used. Also to non eat or booze chemicals used in this lab. armed forces operation:Begin by assembling the calorimeter utilize styrofoam cups. ram down a hole in the chapeau. get down the initial temperature of the mobile in the calorimeter. Watch the thermometer until maximal temperature is achieved. Weigh out 2.0g of NaOH pellets. Record the temperature of the distilled urine in the calorimeter until the temperature is eternal then add all of the pellets at once. Gently bear on the pellets until the acid is dissolved by shiver the the apparatus. Lift the calorimeter lid and wash out its circumscribe and the thermometer. geminate this experiment using 50.0 mL of 1.0M acetic acid. take on experiment using 25.0 mL of each 2.0M sodium hydroxide and 2.0M acetic acid.

Data Table(s): Reaction equation Mass of solid NaOH sign Temp. concluding Temp Delta T NaOH 2.0351 g 23.6 C 31.8 C 8.2 C HC2H3O2 1.9966 24.8 C 41.6 C 16.8 C NaOH + HC2H3O2 25.4 C 32.8 C 7.4 C Calculations/Results: 2.0g NaOH/ 40.0g NaOH= .05M NaOH 174.8kj + -351.12kj = -176.32 174.8 + -351.12) - (154.66) / 154.66 = 2.14% Questions/Problems:Pre-Lab 1.) 2Na+(aq) + OH-(aq)+ HC2H3O2(aq) -> H2O(l) + 2NaOH(s)+C2H3O2-(aq) 2.)Na+(aq) + OH-(aq) -> NaOH(s) +NaOH(s) + HC2H3O2(aq) -> H2O(l) + Na+(aq) + C2H3O2-(aq) 2Na+(aq) + OH-(aq)+ HC2H3O2(aq) -> H2O(l) + 2NaOH(s)+C2H3O2-(aq) 3.) The...If you pauperization to get a wide-eyed essay, recount it on our website: Ordercustompaper.com

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