
Chemistry
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ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Transcribed Image Text:**Chemical Reaction Entropy Prediction Worksheet**
For each chemical reaction listed in the table below, predict the sign (positive or negative) of the reaction entropy (ΔS_rxn). If it's not possible to decide with the information given, select "not enough information".
**Note for Advanced Students:** Assume the temperature remains constant. All gases and solutions are ideal.
| Reaction | Sign of Reaction Entropy |
|---------------------------------------|-----------------------------------|
| Ag⁺(aq) + Cl⁻(aq) → AgCl(s) | ⦿ ΔS_rxn < 0 |
| | ○ ΔS_rxn > 0 |
| | ○ Not enough information |
| | |
| BaCO3(s) → BaO(s) + CO2(g) | ○ ΔS_rxn < 0 |
| | ○ ΔS_rxn > 0 |
| | ○ Not enough information |
| | |
| C2H2(g) + 2H2(g) → C2H6(g) | ○ ΔS_rxn < 0 |
| | ○ ΔS_rxn > 0 |
| | ○ Not enough information |
**Legend:**
- \( \Delta S_{\text{rxn}} < 0 \): The reaction decreases entropy.
- \( \Delta S_{\text{rxn}} > 0 \): The reaction increases entropy.
- Not enough information: Inadequate data to determine the sign of entropy change.
The table has options for each reaction, with the first reaction (Ag⁺(aq) + Cl⁻(aq) → AgCl(s)) selected for \( \Delta S_{\text{rxn}} < 0 \), indicating a decrease in entropy.
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