Practice Integrative Practice Problems (4) - Unit 5: Energetics and Thermochemistry

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6 sample questions

Question 1.
Define Enthalpy.
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Think about heat flow during chemical processes.
Question 2.
What does ΔH_rxn° represent?
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It’s linked to heat exchange in reactions.
3Question 3.
What does ΔH_f° represent?
- Heat of reaction
- Enthalpy change of formation
- Temperature change
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Think about formation of compounds.
4Question 4.
Is bomb calorimetry ideal for measuring heat change at constant volume?
- True
- False
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Consider the setup of the calorimeter.
Question 5.
A 0.500 g sample of glucose (C₆H₁₂O₆) is burned in a bomb calorimeter. If the calorimeter absorbs 15,000 J of heat and the temperature rises by 4 K, calculate ΔH for the combustion.
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Count the moles of gaseous products and reactants during combustion.
Question 6.
Using Hess's Law, determine ΔH when the total reaction involves converting ethane (C₂H₆) to carbon dioxide (CO₂) and water (H₂O), given ΔH_f° values.
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Recollect previous examples of using enthalpy of formation in your calculations.

4 more questions in this section. Enroll free to practise them all.