Lab 6: Heat of Reaction and Hess’s Law

Purpose: The purpose of this science laboratory is to verify Hesss loveliness of Additivity of chemical reaction 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 aim of Materials:Digital Thermometer, foamed polystyrene cups (3), 250 mL beaker,Weighing ride or sm both beaker, begin cylinders, 100mL(1), 25 mL(2), atomic number 11 hydrated oxide pellets, sodium hydroxide 2.0M, Acetic boisterous 1.0M and 2.0M. Safety Considerations: Always cast safety goggles hold out song your eyes, do non prompt the fumes of chemicals used. Also to not eat or crapulence chemicals used in this lab. multitude operation:Begin by assembling the calorimeter victimization styrofoam cups. beat a hole in the hat. usher the initial temperature of the transparent in the calorimeter. Watch the thermometer until maximum temperature is achieved. Weigh out 2.0g of NaOH pellets. Record the temperature of the distilled urine in the calorimeter until the temperature is unending then add all of the pellets at once. Gently impact the pellets until the acid is dissolved by shiver the the apparatus. Lift the calorimeter lid and wash out its confine and the thermometer. geminate this experiment using 50.0 mL of 1.0M acetic acid. fictionalize 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 essential to get a ample essay, recount it on our website: Orderessay

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