A student investigates the temperature change when magnesium reacts with dilute sulfuric acid. The student does five experiments. Experiment 1 - Use a $$\(25 \mathrm{~cm}^{3}\)$$ measuring cylinder to pour $$\(20 \mathrm{~cm}^{3}\)$$ of dilute sulfuric acid into a boiling tube. - Use a thermometer to measure the initial temperature of the acid in the boiling tube. Record the initial temperature. - Add a coiled 5 cm length of magnesium ribbon to the acid in the boiling tube. At the same time start a timer. - Continually stir the contents of the boiling tube using the thermometer. - After 45 seconds, measure the temperature of the mixture in the boiling tube. Record this temperature. - Rinse the boiling tube with distilled water. Experiment 2 - Use the $$\(25 \mathrm{~cm}^{3}\)$$ measuring cylinder to pour $$\(20 \mathrm{~cm}^{3}\)$$ of dilute sulfuric acid into the boiling tube. - Use a $$\(10 \mathrm{~cm}^{3}\)$$ measuring cylinder to add $$\(2.0 \mathrm{~cm}^{3}\)$$ of distilled water to the acid in the boiling tube. - Place a bung in the boiling tube and invert the tube to mix the acid and water. - Use the thermometer to measure the initial temperature of the contents of the boiling tube. Record the initial temperature. - Add a coiled 5 cm length of magnesium ribbon to the contents of the boiling tube. At the same time start a timer. - Continually stir the contents of the boiling tube using the thermometer. - After 45 seconds, measure the temperature of the mixture. Record this temperature. - Rinse the boiling tube with distilled water. Experiment 3 - Repeat Experiment 2, adding $$\(4.0 \mathrm{~cm}^{3}\)$$ of distilled water instead of $$\(2.0 \mathrm{~cm}^{3}\)$$. Experiment 4 - Repeat Experiment 2, adding $$\(6.0 \mathrm{~cm}^{3}\)$$ of distilled water instead of $$\(2.0 \mathrm{~cm}^{3}\)$$. Experiment 5 - Repeat Experiment 2, adding $$\(10.0 \mathrm{~cm}^{3}\)$$ of distilled water instead of $$\(2.0 \mathrm{~cm}^{3}\)$$. Use the information in the description of the experiments and the thermometer diagrams to complete Table 2.1. Table 2.1

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