Practice question · Sort into groups
Sort each statement as applying to Internal energy (U), Heat (Q), or Work (W).
Groups: Internal energy U · Heat Q · Work W
- Energy transferred due to temperature difference
- Energy transferred by a force through a displacement
- A state function; depends only on current state
- for an isothermal ideal gas cycle
Hints
- Ask whether the quantity depends on the path or only on the state.
- Two of the three are transfers rather than properties.
Show the answer
Internal energy U: A state function; depends only on current state, for an isothermal ideal gas cycle
Heat Q: Energy transferred due to temperature difference
Work W: Energy transferred by a force through a displacement
Why
U is a state function; Q and W are path-dependent energy transfers.
Practise First Law of Thermodynamics
The app has 8 more questions on this lesson, and keeps your place in the course. Physics I is free to start.
More questions on First Law of Thermodynamics
- Complete the following passage by choosing the correct terms from the word bank.
- A gas in an insulated cylinder (no heat exchange) is compressed by pushing the piston in. What happens to the…
- The first law says Δ U = Q - W, and internal energy is a state function while heat and work are not. What…
- Order these milestones in the development of thermodynamics.
- For each process on an ideal gas, sort by what the first law says about it. (Q = heat added, W = work done by…
- A gas absorbs 500 J of heat and does 300 J of work pushing its piston out. By how much does its internal…