Victory for the ACT Student Text 15e

314 • S CIENCE

18. Which of the following correctly describes Experiments 1 and 2? F. Experiment 1 is designed to study Boyle’s law and gas temperature is the controlled variable; Experiment 2 is designed to study Charles’s law and gas pressure is the controlled variable. G. Experiment 1 is designed to study Boyle’s law and gas pressure is the controlled variable; Experiment 2 is designed to study Charles’s law and gas temperature is the controlled variable. H. Experiment 1 is designed to study Charles’s law and gas volume is the controlled variable; Experiment 2 is designed to study Boyle’s law and gas pressure is the controlled variable. J. Experiment 1 is designed to study Charles’s law and gas pressure is the controlled variable; Experiment 2 is designed to study Boyle’s law and gas temperature is the controlled variable. 19. In the experiment demonstrating Boyle’s law, the volume of gas at atmospheric pressure was: A. 32 mL. B. 64 mL. C. 100 mL. D. Cannot be determined from the given information. 20. In Experiment 2, the function of the column of oil in the experimental apparatus is to: F. measure the pressure of the air in the glass tube as it expands or contracts. G. measure the temperature of air in the glass tube as it expands or contracts. H. transmit pressure from the reservoir to the gas in the glass tube. J. transmit air to the gas in the glass tube.

21. Does the data graph from Experiment 1 support Charles’s law? A. No; the graph supports Boyle’s law because the data demonstrates that volume and temperature are directly proportional. B. No; the graph does not support Charles’s law because the data demonstrates that volume and pressure are inversely proportional. C. Yes; the graph supports Charles’s law because the data demonstrates that volume and temperature are directly proportional. D. Yes; the graph supports Charles’s law because the data demonstrates that volume and temperature are equal. 22. To test the validity of Boyle’s law, the students should graph gas volume as a function of: F. temperature using the data from Experiment 1. G. temperature using the data from Experiment 2. H. pressure using the data from Experiment 1. J. pressure using the data from Experiment 2. 23. Based on the information provided, which of the following is true for the pressure, P , temperature, T , and/or volume, V, of a sample of gas? A. PV is constant for the same temperature. B. VT is constant for the same pressure. C. P V is constant for the same temperature. D. PVT is constant for all pressures, volumes, and temperatures.