1. The volume of a fixed amount of ideal gas is directly proportional to its tem

Question

1. The volume of a fixed amount of ideal gas is directly proportional to its temperature when the pressure is held constant. Which law is this? a. Boyle's law b. Charles's law c. Ideal gas law d. State of gas law 2. The pressure of a fixed amount of an ideal gas is inversely proportional to the volume when the temperature is held constant. Which law is this? a. Boyle's law b. Charles's law c. Ideal gas law d. State of gas law In our lab, we will use a 2-liter soda bottle and a PASCO tube to verify Boyle's law. We can rearrange the Equation of State of an Ideal Gas to the following: L= where Vo is the volume of the air in the 2-liter bottle plus the connecting tube, L is length PASCO tube; A is cross-sectional area of PASCO tube, and P is pressure. Questions 3-6 refer to a plot of air column length versus inverse pressure, L vs. 1/P ("y" vs"x") 3. Should the plot yield a curved line or a straight line? a. curved line b. straight line 4. What does the slope of the plot represent (what is it equal to symbolically)? 5. What would the y-intercept represent (what is it equal to symbolically)? 6. What should be approximately equal to? Questions 7-8: In the Ideal Gas Law experiment, the volume of the air in the cylinder is changed a. 2000 ml b. 2x10m c. 2 liters d. Choices a, b and c are all correct. by adding weights to the moveable piston. The piston itself has a mass of 35 grams with a diameter of 32.5 mm. For the 80 g, mass added to the piston, an air column length of 58.1 mm was recorded. See next page for helpful formulas. SI Pressure Units: 1 Pa-1 Nr 7. What is the cross-sectional area of the piston in units of meters squared (m2)? Show your work. 8. For the 80 g added mass (added to the piston), what is the total pressure of the gas inside the cylinder if the atmospheric pressure is 1.000x10 Pa? Show your work.

Explanation / Answer

1. charles law - volume of an ideal gas at constant pressure is directly proportional to the absolute temperature.

Ans: (B)

2. (A) Boyle's law

3. L = (n RT / A ) (1/P) - V0/A

y = m x + c

equation of straight line

Ans(b)

4. slope = m = n RT / A

Ans(C)

5. y - intercept = c = - V0 / A

Ans(d)

6. (D)

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