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Exp4_flame

# Exp4_flame - system what is the magnitude and sign of the...

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Experiment 4- How Hot is that Flame? Name___________________________ Report Sheet Partners________________________ ________________________________ Table 1. Calorimeter Data Investigation 1 Investigation 2 Investigation 3 Heat capacity of calorimeter Enthalpy of HCl/Mg reaction Enthalpy of HCl/MgO reaction mass of calorimeter (g) mass of sample (g) (CW) (Mg) (MgO) mass of water (g) (RT) (HCl) (HCl) final temperature ( ° C) (RT) (CW) initial temperature ( ° C) (RT) (CW) T (final-initial) ( ° C) (RT) (CW) Calculations: Calculate the calorimeter constant as K cal , which is mass × heat capacity. Calculate the heat released by the HCl/Mg reaction in J. Assuming that what is inside the thermos is the

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Unformatted text preview: system, what is the magnitude and sign of the heat released by the reaction? Calculate the molar enthalpy of HCl/Mg reaction in kJ/mol. Calculate the heat released by the HCl/MgO reaction in J. Calculate the molar enthalpy of HCl/MgO reaction in kJ/mol. Calculate the enthalpy of Mg + O 2 MgO in kJ/mol. (be sure to show the 3 reactions used) Results and Discussion: What is the percent error in your measurement of the enthalpy of the reaction? (compare your value to the book value) Discuss the possible sources of error in the experiment. Why did your results differ from the true value?...
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