Practice The General Case (5.1.4.c) - Thermodynamics

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6 sample questions

Question 1.
Define internal energy in your own words.
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Consider all the forms of energy present in a system.
Question 2.
In the first law of thermodynamics, what does the term 'isolated system' mean?
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Think about what happens to the energy in such systems.
3Question 3.
What does the internal energy of a system represent?
- Only kinetic energy
- Only potential energy
- Total energy contained within the system
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Think about what makes up the energy of a system.
4Question 4.
True or False: In an isolated system, energy can be added or removed.
- True
- False
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Consider what isolated means in context.
Question 5.
A closed system absorbs 20 kJ of heat and does 5 kJ of work. What is the change in internal energy?
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Use the basic formula we discussed earlier.
Question 6.
Explain how energy conservation plays out in a chemical reaction in real-world applications like engines.
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Link practical applications like car engines to our discussions on energy.

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