Subjects
| Sections | |||
|---|---|---|---|
| Internal Energy | 22 mins | 0 completed | Learn |
| Calorimetry | 39 mins | 0 completed | Learn |
| Thermochemical Equation | 6 mins | 0 completed | Learn Summary |
| Hess's Law | 17 mins | 0 completed | Learn |
| Enthalpy of Formation | 13 mins | 0 completed | Learn Summary |
| End of Chapter 6 Problems | 52 mins | 0 completed | Learn |
| Additional Practice |
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| Units of Energy |
| Additional Guides |
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| Endothermic & Exothermic Reactions |
| Enthalpy |
Classify the following by the sign of delta U for the system: the following can be classified into these three categories (negative,positive, not enough data)
1. The system contracts and the surroundings get cooler.
2. The system expands and the surroundings get cooler.
3. The system contracts and the surroundings get hotter.
4. The system expands and the surroundings get hotter.