June 2009 Chemistry Regents #51-53

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Questions

Base your answers to questions 51 through 53 on the information below. A sample of helium gas is in a closed system with a movable piston. The volume of the gas sample is changed when both the temperature and the pressure of the sample are increased. The table below shows the initial temperature, pressure, and volume of the gas sample, as well as the final temperature and pressure of the sample. 51 In the space in your answer booklet, show a correct numerical setup for calculating the final volume of the helium gas sample. [1] LINK TO SEE THE ANSWER 52 Convert the final temperature of the helium gas sample to degrees Celsius. [1] HIGHLIGHT TO SEE THE ANSWER 27C C=300-273 53 Compare the total number of gas particles in the sample under the initial conditions to the total number of gas particles in the sample under the final conditions. [1] HIGHLIGHT TO SEE THE ANSWER The total number of gas particles is the same under the initial and final conditions. The total number of particles before and after is the same. Next Questions

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