Lab_9.docx - Enthalpy and Specific Heat PRE-LAB QUESTIONS 1...

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PRE-LAB QUESTIONS 1.When 3.0 kg of water is warmed from 10 °C to 80 °C, how much heat energy is needed? 2.A calorimeter contains 100 g of water at 39.8 ºC. A 8.23 g object at 50 ºC is placed insidethe calorimeter. When equilibrium has been reached, the new temperature of the water and metal object is 40 ºC. What type of metal is the object made from? 3. Enthalpy and Specific Heat
EXPERIMENT 1: DETERMINATION OF SPECIFIC HEAT OF A METAL Data Sheet Table 2: Mass Mass (g) Water 48.3g Unknown Metal Strip 2.0g Table 3: Specific Heat Data Time (minutes) Temperature (°C) Trial 1 Trial 2 Trial 3 Initial 21.4 22.0 22.5 5 minutes 21.8 22.2 22.7 6 minutes 21.7 22.3 22.6 7 minutes 21.6 22.3 22.7 8 minutes 21.7 22.3 22.8 9 minutes 21.8 22.5 22.7 10 minutes 21.9 22.4 22.6 Average Specific Heat Capacity of the Unknown Metal: 0.2598 22.0 22.2 0.2 -77.8 -40.41744 Post-Lab Questions Enthalpy and Specific Heat

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