IB skill practice

Use entropy and second-law reasoning

Paper 1, Paper 2 5 marks Difficulty 5

Entropy change from heat transfer

Heat \(360\,\text{J}\) is transferred reversibly to a reservoir at \(330\,\text{K}\) in a entropy mixing demonstration. Calculate the entropy change. Enter the numerical result and choose the interpretation that matches the physics meaning.

Worked practice: physics data and result

Read the physical quantities first, then calculate the result and state what it means.