Practice The Internal Energy As A State Function (5.1.4)

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6 sample questions

Question 1.
What does internal energy represent in a system?
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Think about what types of energy are present in chemical and physical processes.
Question 2.
What is ΔU in relation to heat and work?
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Recall the equation that describes internal energy changes.
3Question 3.
What does internal energy depend on?
- A. Path taken
- B. Initial and final states
- C. Temperature only
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Consider the definition of state functions.
4Question 4.
In an adiabatic process, what happens to heat (q)?
- True
- False
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Think about what distinguishes adiabatic from other processes.
Question 5.
A gas in a piston does 200 J of work on the surroundings while absorbing 150 J of heat. Calculate the change in internal energy.
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Remember the sign convention for work done by the system.
Question 6.
Consider a system that has 1000 J of internal energy. If it performs 300 J of work and releases 200 J of heat, what will its new internal energy be?
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Use the internal energy change formula applied to given conditions.

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