Objective 5: Entropy and the direction of mixing
Before you begin
Your goal: Explain the Second Law’s restrictions on physical change and use a complete entropy balance to decide whether thermal mixing can proceed spontaneously.
Build from the meaning of entropy to its system-and-surroundings balance, then calculate and interpret both contributions in a mixing example. The activity includes the entropy statement and the Clausius and Kelvin–Planck formulations.
- Read each question and write your answer and reasoning on paper or in your own notes.
- Keep your original answer intact. Do not erase or overwrite it.
- Switch on “Reveal answer,” then separately record what you got right, what you got wrong, and what you left out.
- Rewrite your answer underneath the original, staying as faithful as possible to your own wording while making the necessary corrections and additions.
- Finish your reflection and rewrite, then select “Next question.” Earlier questions collapse and can be reopened. The “Compare, then revise” reminder is available inside each answer. The Key connections sidebar grows as you reveal answers.
This page does not collect your answers or save your progress. Write everything separately.
Estimated: 1 hr 10 min–1 hr 40 min
Suggested block: 1 hr 40 min
About this estimate
Plan for 70–100 minutes. This includes working through all 15 questions, writing your answers separately, comparing and revising them, and completing the independent mixing calculation. The estimate assumes brief responses without outside research. This is a planning estimate; your pace may vary.
Your answers stay in your own notes. This page does not collect responses or save progress. Reloading starts the lesson again.