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unlution) of 10 M H:SO and 1.00 M NaOH Data Trial 1 Trial 2 Initial temperature of 10 MH S0 (5.0 mL in a graduated cylinder) 23.9 °C| 23.3 22.0 c 34-5 oc eC Initial temperature of calorimeter (50.0 mL of 1.00 M NaOH 45.0 mL water) 22.2 Final temperature of the mixed solutions in calorimeter (50 mL. 1.00 M NaOH 45.0 mL water 5.0 mL. 10 M H:SO.) 3) oc ec Calculations Trial 1 Trial 2 a) Temperature change of NaOH solution in calorimeter (b) Temperature change of added H SO, solution °C °C e) Calculate the heat gained by the NaOH solution. Assume that he product of density heat capacity d) Calculate the heat gained by the H:SO,solution. Assume that he product of density heat capacity e) Calculate Δ/heaton (1) Calculate the moles of added H SO mol H2SO· 10(L) M (mol/L) mol mol g) Calculate Δ/fracta, per mole of reactants by dividing the results of part I (e) by the number of moles of H S0, calculated in part I (f). Express the final result in units of kJ/mol. Be sure to keep the proper sign of the calculated reaction enthalpy kJ/mol kJ/mo kJ/mo Average Page 6

pata and Calculations Part I: Determining the calorimeter constant Data Trial 1 Trial 2 114 5E (a) Mass of empty Styrofoam cups (b) Mass of cups + 70 mL water (c) Mass of cups+ 70 mL water +30 mL hot water (d) Initial temperature of water in the calorimeter (cups) (e) Temperature of the boiling water bath (D Final temperature of calorimeter + added hot water 11.97- /o3.31g 22.3 C 9o- 38.6 C 44.1c Calculations (g) Mass of cool water in cups, mew Ib - al (h) Mass of added hot water, myw [c-b (i) Temperature change of cool water in the calorimeter G) Temperature change of added hot water (k) Calculate the heat lost by the hot water (1) Calculate the heat gained by the cold water (m) Calculate the heat gained by the calorimeter (n) Calculate the calorimeter constant, B J/K J/K (o) Average calorimeter constant, B Page 6


: Determining the heat eapacity of an unknown metal Data Unknown Identifter(s) (a) Mass of empty Styrofoam cups (b) Mass of cups+ 100 mL water (c) Mass of cups+ 100 mL water + hot metal (d) Initial temperature of water in the calorimeter (cups (e) Temperature of the boiling water bath (D Final temperature of water + added hot metal Metal 1 Metal 2 9.50 -95 91-83 21.3 °CI 22.3 C 95 95-1 Calculations (g) Mass of water in cups, mcw, I b-al (b) Mass of added hot metal, m c-b (0) Temperature change of the water in the calorimeter (i) Temperature change of the added hot metal (k) Calculate the heat gained by the cool water (1) Calculate the heat gained by the calorimeter (m) Calculate the total heat gained K. (n) Since Δ//ーーΔΗ,calculate the heat los by the hot metal ΔΗ.u--ΔΗ (o) Calculate the specific heat capacity of the metal from gamed ost (p) Atomic weight of metal (4) Identity of the metal (from the table 1) tiplied by the molar mass of the metal in grams per mole is a constant: Cs x MM 25] mol-1 K- 1. mass (grams per mole) for each of the metal studied in each trial The law of Dulong and Petit states that the heat capacity of a metal in joules per gram per kelvin In step (o), you determined the heat capacity in joules per gram per kelvin. Solve for the mola

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