GC_4156_L07_Enthalpy_Specific_Heat (2).docx - Enthalpy and...

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PRE - LAB Q UESTIONS 1. When 3.0 kg of water is warmed from 10 °C to 80 °C, how much heat energy is needed? a. q = 879060 J of energy 2. A calorimeter contains 100 g of water at 39.8 ºC. A 8.23 g object at 50 ºC is placed inside the 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? a. Magnesium EXPERIMENT 1: DETERMINATION OF SPECIFIC HEAT OF A METAL Data Sheet Table 2: Mass Mass (g) Water 50 g Unknown Metal Strip 9.6 g Table 3: Specific Heat Data Time (minutes) Temperature (°C) Trial 1 Trial 2 Trial 3 Initial 40 40 39 5 minutes 41 42 41 6 minutes 43 43 42 Enthalpy and Specific Heat
7 minutes 44 45 44 8 minutes 45 45 45 9 minutes 46 46 45 10 minutes 47 47 47 Average Specific Heat Capacity of the Unknown Metal: 41.71 Post-Lab Questions 1. Why is ΔT metal < 0? a. When metal looses energy, final temperature of metal i.e. T final is less than T

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