The following questions are associated with the dissolving of the ammonium nitrate in water: NH4NO3(s) -> NH4+(aq) + NO3-(aq) 1. Based on your observations was this reaction endothermic or exothermic? Explain your reasoning in complete sentences.
The following questions are associated with the dissolving of the ammonium nitrate in water: NH4NO3(s) -> NH4+(aq) + NO3-(aq)
1. Based on your observations was this reaction endothermic or exothermic? Explain your reasoning in complete sentences.
2. Calculate qcontents – the heat associated with the temperature change of the contents in the calorimeter. For the final temperature, use the lowest temperature that you obtained. (Hint: Use the heat capacity of water for the contents, 4.18 J/goC. Use the total mass of the mixture since the whole mixture changed temperature.)
3. What is the value of qrxn for the dissolving of ammonium nitrate in water?
4. Calculate the number of moles of ammonium nitrate used in the reaction.
5. Using your results from the previous two questions, calculate the enthalpy change DeltaHrxn in kJ/mol for the reaction.
6. Determine the theoretical enthalpy change for the reaction using standard enthalpies of formation. (https://openstax.org/books/chemistry-2e/pages/g-standard-
7. Calculate the % error in your value of deltaHrxn.
The following questions are associated with the Hot-Pack reaction:
4 Fe(s) + 3 O2(g) -> 2 Fe2O3(s)
Based on your observations, is this reaction endothermic or exothermic? Explain your reasoning in complete sentences.
Determine the theoretical enthalpy change for the reaction using standard enthalpies of formation. (https://openstax.org/books/chemistry-2e/pages/g-standard-thermodynamic-properties-for-selected-substances)
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