Lab Report: Specific Heat

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Lab Report: Specific Heat Name: Sample Data DATA PROCEDURE A: The Hot Water and the Cold Metal Mass of the empty foam cup, with lid = 26.0 g | Masses | Initial Temperatures | Equilibrium Temperature | Changes in Temperature | | | | | | | | | Case 1 | 80.0 g | 301.2 g | 0°C | 85°C | 83.2°C | +83.2 C° | -1.8 C° | Case 2 | 80.0 g | 152.0 g | 10°C | 70°C | 67.3°C | +57.3 C° | -2.7 C° | DATA PROCEDURE B: The Hot Metal and the Cold Water | Masses | Initial Temperatures | Equilibrium Temperature | Changes in Temperature | | | | | | | | | Case 3 | 80.0 g | 285.1 g | 88°C | 11°C | 12.9°C | -75.1 C° | +1.9 C° | Case 4 | 80.0 g | 142.3 g | 73.4°C | 0°C | 3.8°C | -69.6 C° | +3.8 C° | CALCULATIONS PROCEDURES A and B: | Experimental | Case 1 | 0.341 J/g C° | Case 2 | 0.375 J/g C° | Case 3 | 0.377 J/g C° | Case 4 | 0.407 J/g C° | Average: | 0.375 J/g C° | Type of material: | Copper, 0.386 J/g C° | % error: | 2.8% | The table shows some specific heats of common metals: Metal | Specific Heat (J/g˚C) | Metal | Specific Heat (J/g˚C) | aluminum | 0.901 | silver | 0.234 | steel | 0.450 | gold | 0.129 | zinc | 0.390 | lead | 0.128 | copper | 0.386 | | | Questions PROCEDURES A and B: 1. In every trial, who changed temperature more, the metal or the water? Did it matter whether it was initially hot or cold? Why? The metal always had a larger change in temperature than the water, no matter whether the metal started hot or cold. This is because the metal has much less mass than the water in each trial. In general, the part of the system with less mass will change temperature more. 2. Of the four trials, transfer to the first row of this column the data for the trial that came closer to the theoretical value: | | | | | | Best Case | 80.0 g | 285.1 g | -75.1 C° | +1.9 C° | 0.377 |
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