Practice Problem 1: Enthalpy Of Reaction Via Formation Values (4.1)

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8 questions

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6 sample questions

Question 1.
What is enthalpy?
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Think about heat flow and energy.
Question 2.
Define exothermic reaction.
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It feels warm to the touch.
3Question 3.
What does a negative ΔH indicate?
- Endothermic reaction
- Exothermic reaction
- No reaction
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It’s typically associated with burning fuels.
4Question 4.
True or False: Standard enthalpy of formation values for all elements in their most stable states are zero.
- True
- False
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Think of natural states of common elements.
Question 5.
Calculate the ΔH_rxn° for the given reaction: 2 H₂(g) + O₂(g) → 2 H₂O(l) using the known ΔH_f° values.
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Remember to apply coefficients in the calculation.
Question 6.
Using Hess’s Law, derive the enthalpy change for the formation of glucose from carbon dioxide and water, reminding yourself of indirect pathways.
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Think about the cycle of creation and breakdown representing sugar synthesis.

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