Entropy of the universe
For a process in a Auckland reaction-rate practical, \(\Delta S_{\text{system}}=78\,\text{J K}^{-1}\) and \(\Delta S_{\text{surroundings}}=-12\,\text{J K}^{-1}\). Calculate \(\Delta S_{\text{universe}}\). Enter the answer and choose the interpretation that matches the HL chemistry evidence.
Worked practice: chemistry evidence and answer
Use the chemical evidence first, then enter the result and interpretation that match it.
Write a full answer
Now write the response in full, in your own words — this is what the exam asks for. The AI marks it on the same moves you built above (focus, evidence, technique, judgement) and gives feedback on reasoning, evidence, and expression.