DATA: Mass of the testube: 32.310 g Mass of the testube and UNKNOWN substance: 8
ID: 953474 • Letter: D
Question
DATA:
Mass of the testube: 32.310 g
Mass of the testube and UNKNOWN substance: 82.646
volume of H2O: 50ml
Initial temp. of H2O: 21 degrees Celcius
Final Temp of the H2O: 27.1 degrees Celcius
Heat capacity of unknown metal 10. Calculate the heat gained by the water in the calorimeter (q) after adding the unknown metal. 11. Calculate the heat gained by the calorimeter(ari) after adding the unknown metal. 12. Using results from questions 10 and 11, calculate the heat lost by the unknown metal (q) 13. Calculate the specific heat capacity of the unknown metal in g-k 14. Use the law of Dulong and Petit given in the introduction to calculate an approximate molar mass of your metal.Explanation / Answer
Volume of H2O = 50 mL
desity of H2O = 1 g/mL then mass of H2O = 50 g
q H2O = - q substance
q H2O = 50 * 4.184 * (27.1 - 21)
q H2O gained = 1276.12 J
q substance lost = 1276.12 J
q substance = m * s * dT
1276.12 = (82.646-32.310)*s*(27.1-21)
Specific heat capacity = 4.15 J/g C
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