Practice Heat, Internal Energy And Work (11.4) - THERMODYNAMICS

Practise this section

9 questions

Flashcard drill
4 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
Sign up to start the exercise
Quiz
3 questions · about 2 min · pass mark 70%. Hints available.
Sign up to start the quiz

6 sample questions

Question 1.
What is heat in thermodynamics?
Show hintHide hint
Think about how energy moves when two objects of different temperatures are in contact.
Question 2.
What does internal energy refer to?
Show hintHide hint
Consider the molecular level of energy within a substance.
3Question 3.
Heat always flows from which to which?
- Cold to Hot
- Hot to Cold
- Equally both ways
Show hintHide hint
Think about your experiences with hot coffee or tea.
4Question 4.
True or False: Internal energy is affected by how the energy state was achieved.
- True
- False
Show hintHide hint
Recall the definition of state variables.
Question 5.
A gas in a piston absorbs 500 J of heat and does 200 J of work. What is the change in internal energy?
Show hintHide hint
Use the equation ΔU = ΔQ - ΔW to guide your calculation.
Question 6.
If a closed system expands doing 150 J of work and there is no heat exchange with the environment, how does this affect the internal energy?
Show hintHide hint
Consider the relationship of work, heat, and internal energy from the First Law.

5 more questions in this section. Enroll free to practise them all.