Practice For Closed Systems (4.2) - Combustion and Fuels

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6 sample questions

Question 1.
What does the first law of thermodynamics state?
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Think about how energy behaves in reactions.
Question 2.
What does ΔU represent in the first law?
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Consider the energy before and after a process.
3Question 3.
What is the first law of thermodynamics?
- Energy can be created or destroyed.
- Energy can only be converted.
- Energy can be destroyed under pressure.
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Consider energy transformations in reactions.
4Question 4.
In a closed system, which of the following is true?
- True
- False
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Reflect on how systems interact with their environment.
Question 5.
A certain closed system undergoes a process where 600 Joules of heat is absorbed and 150 Joules of work are done by the system. Calculate the change in internal energy.
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Apply the first law.
Question 6.
If an enthalpy table shows a reaction from reactants to products with variation in their stored energies, elaborate how these changes relate to the first law.
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Consider the relationship between internal energy and enthalpy.

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