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C. COMPARING FUELS: A student wanted to compare the energy released when different fuels burned. To make it a fair test she put 1 g of each fuel in a little dish. Then she burned each fuel under calorimeter containing 200 cm³ of water. These are the result. (Complete the table) Fuel Temperature at the start in °C Temperature at the end in °C Temperature rises in °C Methanol 25 56 ethanol 18 53 propanol 17 54 butanol 23 63 A. Calculate each temperature rise and state which fuel releases most energy per gram. Another student used spirit burners for the experiment. She had to weight them before and after each test to find out how much fuel she had used. To make it a fair test she used each fuel to make the same amount of water 10 °C. These are the results. Fuel Mass of burner at the start in g Mass of fuel using g Mass of burner at the end in g 150.7 Methanol 153.3 ethanol 213.4 210.6 propanol 185.8 183.4 butanol 198.5 196.3 B. Calculate the mass of each fuel she had to use to release the same amount of energy, and state which fuel must release more energy per gram.. C. What could you do to prove that your result is repeatable? D. Results are reproducible if they lead to the same conclusions when different people do the experiments or when different methods are used. Are the results reported reproducible?

C. COMPARING FUELS: A student wanted to compare the energy released when different fuels burned. To make it a fair test she put 1 g of each fuel in a little dish. Then she burned each fuel under calorimeter containing 200 cm³ of water. These are the result. (Complete the table) Fuel Temperature at the start in °C Temperature at the end in °C Temperature rises in °C Methanol 25 56 ethanol 18 53 propanol 17 54 butanol 23 63 A. Calculate each temperature rise and state which fuel releases most energy per gram. Another student used spirit burners for the experiment. She had to weight them before and after each test to find out how much fuel she had used. To make it a fair test she used each fuel to make the same amount of water 10 °C. These are the results. Fuel Mass of burner at the start in g Mass of fuel using g Mass of burner at the end in g 150.7 Methanol 153.3 ethanol 213.4 210.6 propanol 185.8 183.4 butanol 198.5 196.3 B. Calculate the mass of each fuel she had to use to release the same amount of energy, and state which fuel must release more energy per gram.. C. What could you do to prove that your result is repeatable? D. Results are reproducible if they lead to the same conclusions when different people do the experiments or when different methods are used. Are the results reported reproducible?

Chemistry: Principles and Reactions
Chemistry: Principles and Reactions
8th Edition
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:William L. Masterton, Cecile N. Hurley
Chapter8: Thermochemistry
Section: Chapter Questions
Problem 14QAP: In earlier times, ethyl ether was commonly used as an anesthetic. It is, however, highly flammable....
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Complete the table and answer the question in letter b,c and d.

C. COMPARING FUELS: A student wanted to compare the energy released when different fuels burned. To make it a fair test she put 1 g of each fuel in a little dish. Then she burned each fuel under calorimeter containing 200 cm³ of water. These are the result. (Complete the table) Fuel Temperature rises in °C Temperature at the start in °C Temperature at the end in °C 25 Methanol 56 ethanol 18 53 propanol 17 54 butanol 23 63 A. Calculate each temperature rise and state which fuel releases most energy per gram. Another student used spirit burners for the experiment. She had to weight them before and after each test to find out how much fuel she had used. To make it a fair test she used each fuel to make the same amount of water 10 °C. These are the results. Fuel Mass of fuel using g Mass of burner at the start in g 153.3 Mass of burner at the end in g 150.7 Methanol ethanol 213.4 210.6 propanol 185.8 183.4 butanol 198.5 196.3 B. Calculate the mass of each fuel she had to use to release the same amount of energy, and state which fuel must release more energy per gram. C. What could you do to prove that your result is repeatable? D. Results are reproducible if they lead to the same conclusions when different people do the experiments or when different methods are used. Are the results reported reproducible?_
Transcribed Image Text:C. COMPARING FUELS: A student wanted to compare the energy released when different fuels burned. To make it a fair test she put 1 g of each fuel in a little dish. Then she burned each fuel under calorimeter containing 200 cm³ of water. These are the result. (Complete the table) Fuel Temperature rises in °C Temperature at the start in °C Temperature at the end in °C 25 Methanol 56 ethanol 18 53 propanol 17 54 butanol 23 63 A. Calculate each temperature rise and state which fuel releases most energy per gram. Another student used spirit burners for the experiment. She had to weight them before and after each test to find out how much fuel she had used. To make it a fair test she used each fuel to make the same amount of water 10 °C. These are the results. Fuel Mass of fuel using g Mass of burner at the start in g 153.3 Mass of burner at the end in g 150.7 Methanol ethanol 213.4 210.6 propanol 185.8 183.4 butanol 198.5 196.3 B. Calculate the mass of each fuel she had to use to release the same amount of energy, and state which fuel must release more energy per gram. C. What could you do to prove that your result is repeatable? D. Results are reproducible if they lead to the same conclusions when different people do the experiments or when different methods are used. Are the results reported reproducible?_
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