Preparation
Fundamentals: Graphing

Name:

Read

1. This experiment.
2. The appropriate sections of your textbook.

Problems

1. The following data show the pressure exerted by a gas as a function of its volume:
   
   

   Volume, mL	Pressure, torr
   33.3	600
   20.0	1000
   14.3	1400
   12.5	1600
   10.0	2000

   
   
   • Plot P (on the ordinate) versus V (on the abscissa).
   • Make a second plot to obtain a straight line. From the graph, obtain value and units of
     • The slope
     • The intercept
2. You measure a quantity, y, as a function of a quantity, x, and find the following functional relation between them:
   
   1/y = 1/ax³ + a/b

   The units of y are moles L^-1 s^-1 and those of x are moles L^-1. The slope of a plot of 1/y vs. 1/x³ is 10.12 and the intercept is 2.84. From this information determine

   • units of the slope
   • units of the intercept
   • numerical value and units of a
   • numerical value and units of b