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Calculate balloon volume for each balloon at maximum inflation from circumference data.?

• Time (in minutes) After Addition of H2O Balloon #1 Circumference Balloon #2 Circumference Balloon #3 Circumference 0 minutes 21.5cm 22.0cm 22.0cm 2 minutes 26.0cm 29.5cm 29.0cm 4 minutes 26.0cm 31.0cm 30.5cm 6 minutes 25.5cm 30.3cm 31.0cm 8 minutes 25.2cm 30.3cm 31.0cm 10 minutes 25.0cm 30.1cm 31.5cm 12 minutes 24.5cm 30.5cm 33.0cm 14 minutes 24.5cm 30.5cm 34.0cm 16 minutes 25.5cm 31.0cm 33.5cm 18 minutes 25.0cm 30.5cm 34.0cm 20 minutes 25.0cm 30.5cm 34.0cm Part II Data Table (6 points) Trial #1 Trial #2 Trial #3 Circumference of Balloon at Room Temperature 24.0cm 29.5cm 36cm Circumference of Balloon at 60oC to 70oC 27.0cm 32.0cm 37.0cm B. Follow-Up Questions (Show all work for calculations) Part I 1. Calculate balloon volume for each balloon at maximum inflation from circumference data. (You will have to assume that the balloon was a perfect sphere.) To calculate balloon volume, first find the radius (in cm) of the balloon by using the formula C = 2πr. Then, use the radius' value in the formula V = (4/3) πr3 to calculate volume (in cm3). (24 points) 2. Calculate the experimental value for the number of moles of CO2 in each balloon at maximum inflation using the formula PV = nRT. Use the volume you calculated in question #1 at maximum inflation (the unit needs to be L), and recall that R = 0.0821 L(atm)/mol.K. To find the temperature, look at your home thermostat and convert this temperature to Celsius using the formula °C = 5/9(ºF - 32). Then, convert to Kelvins using the formula K = °C + 273. To find the pressure, use the internet to access the National Weather Service internet website. It will give you the pressure at your location on the day you perform the experiment. Pressure is given in inches of mercury (inHg). You will need to convert since the website gives pressure in inHg and the equation needs atm. Convert to atm using the following equalities: 1 in = 2.54 cm, 1 cm = 10 mm, 760 mmHg = 1 atm. (39 points) 3. Calculate the theoretical value for the number of moles of CO2 that should have been produced in each balloon assuming that 2.0g of NaHCO3 is present in an antacid tablet. (You will have to use stoichiometry.) (15 points) The balanced chemical equation for the reaction that occurred in the balloons is as follows: NaHCO3 + H2O ---> NaOH + H2O + CO2 moles NaHCO3 = 2.0 g/84 g/mol=0.024 = moles CO2 4.How do your answers from calculation question #2 compare with your answers to calculation question #3? Explain any discrepancies. (10 points) 5. Graph balloon volume vs. number of tablets used. Since the independent variable in this experiment was the number of tablets used, that variable should be plotted on the horizontal axis. The dependent variable was the volume of the balloon; that variable should be plotted on the vertical axis. Make sure to consult the graph rubric to ensure that your graph meets all of the requirements. (15 points) 6.Once you have completed your graph, describe the relationship between the number of tablets in the balloon and the volume of the balloon. 7. Calculate the balloon volume of each balloon from circumference data. (You will have to assume that the balloon was a perfect sphere.) To calculate balloon volume, first find the radi us (in cm) of the balloon by using the formula C = 2πr. Then, use the radius' value in the formula V = (4/3) πr3 to calculate volume (in cm3). (24 points) 8. Graph balloon volume vs. temperature of gas. Since the independent variable in this experiment was the temperature, that variable should be plotted on the horizontal axis. The dependent variable was the volume of the balloon; that variable should be plotted on the vertical axis. Make sure to consult the graph rubric to ensure that your graph meets all of the requirements. (15 points) 9. Once you have completed your graph, describe the relationship between the temperature and the volume of the balloon. (15 points) 10. Which gas law (s) does/do this portion of the lab demonstrate? Was your result consistent with the law? (15 points)

• Answer:

  srry but i cano one canmnt answer dis...probably