General Chemistry Experiment#4 Gas properties Lab report
Discussion Questions
1. At constant temperature, if n represents the moles of gas present, what would be the
expected relationship between pressure (P) and the number of moles of gas (n). (Hint:
Assume that Avogadroâs hypothesis that âequal volumes of gases, at the same temperatureand pressure, contain equal numbers of moleculesâ is true.) (3 pts.)
2. Based on the relationship between P, T, n and V, state a combined gas law connecting allthe four variables using a new proportionality constant, K. Justify your answer. (5 pts.)
3. From your plot of pressure vs. temperature, why is the unit of temperature in the gasequation reported in Kelvin? What would happen if degrees Celsius were used? (5 pts.)4. Identify the three gas laws covered in this experiment. Describe the relationship observedin each law. Then, describe the relationship observed in the experiment. Do your findingssupport the gas laws? If not, explain why. (7 pts.)HINT: review the gas laws table completed in the pre-lab activity.5. In Part III, as you placed the apparatus in the warm water bath, you should have noticedthe volume of air in the syringe increased. Explain what has happened to the gas. What
variable should have remained constant? (5 pts.)
Please explain your answers.
General Chemistry Experiment#4 Gas properties Lab report
Discussion Questions
1. At constant temperature, if n represents the moles of gas present, what would be the
expected relationship between pressure (P) and the number of moles of gas (n). (Hint:
Assume that Avogadroâs hypothesis that âequal volumes of gases, at the same temperatureand pressure, contain equal numbers of moleculesâ is true.) (3 pts.)
2. Based on the relationship between P, T, n and V, state a combined gas law connecting allthe four variables using a new proportionality constant, K. Justify your answer. (5 pts.)
3. From your plot of pressure vs. temperature, why is the unit of temperature in the gasequation reported in Kelvin? What would happen if degrees Celsius were used? (5 pts.)4. Identify the three gas laws covered in this experiment. Describe the relationship observedin each law. Then, describe the relationship observed in the experiment. Do your findingssupport the gas laws? If not, explain why. (7 pts.)HINT: review the gas laws table completed in the pre-lab activity.5. In Part III, as you placed the apparatus in the warm water bath, you should have noticedthe volume of air in the syringe increased. Explain what has happened to the gas. What
variable should have remained constant? (5 pts.)
Please explain your answers.
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