Lab 6: Heat of Reaction and Hess’s Law

Purpose: The purpose of this lab is to verify Hesss fair play of Additivity of Reaction Enthalpies 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 chance upon of Materials:Digital Thermometer, foamed polystyrene cups (3), 250 mL beaker,Weighing boat or sm altogether beaker, earn cylinders, 100mL(1), 25 mL(2),sodium hydrated oxide pellets, sodium hydroxide 2.0M, Acetic bitter 1.0M and 2.0M. Safety Considerations: Always have safety goggles proceed song your eyes, do non inhale the fumes of chemicals used. Also to not eat or drink chemicals used in this lab. multitude operation:Begin by assembling the calorimeter using styrofoam cups. push a hole in the lid. get down the initial temperature of the liquified in the calorimeter. Watch the thermometer until maximum temperature is achieved. Weigh out 2.0g of NaOH pellets. Re cord the temperature of the distilled urine in the calorimeter until the temperature is constant then add all of the pellets at once. Gently stir 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. repeat experiment using 25.0 mL of each 2.0M sodium hydroxide and 2.0M acetic acid.

Data Table(s): Reaction equation Mass of consentaneous NaOH Initial 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 want to get a full essay, recount it on our website: OrderCustomPaper.com

If you want to get a full essay, visit our page: write my paper