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| 1. |
What is the enthalpy change of a reaction at 90°C, if the enthalpy of reactant at 90°C and 25°C are 60 J and 25 J, and enthalpy of product at 90°C and 25°C are 80 J and 10 J, and the enthalpy change of reaction at 25°C is 5 J? |
| A. | 10 J |
| B. | 50 J |
| C. | 110 J |
| D. | 150 J |
| Answer» D. 150 J | |