Practice Accurate Energy Balance In Combustion Calculations (5.3.2)

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6 sample questions

Question 1.
What does ΔH_f^0 represent?
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What does it mean when we talk about the formation of a compound?
Question 2.
How do you write the formula for heat of reaction (ΔH_r)?
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What do we subtract to find the heat of reaction?
3Question 3.
What does ΔH_r represent in a reaction?
- Heat of formation
- Heat of reaction
- Internal energy
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Which term indicates reaction-related heat change?
4Question 4.
Is ΔH_f^0 needed to determine ΔH_r?
- True
- False
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Consider how you derive one from the other.
Question 5.
Calculate the heat of reaction for the combustion of butane (C4H10) using the standard enthalpy values from enthalpy tables for butane, CO2, and H2O.
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Use the stoichiometric coefficients from the balanced equation.
Question 6.
Discuss the impact of varying oxygen excess on the heat of reaction for a hydrocarbon fuel combustion.
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What happens to energy when there’s too much or too little oxygen?

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