Supplemental Material for Elementary Principles of Chemical Processes Example 3.1-1 Mass, Volume, and Density (a) Liquid methanol can be used in portable fuel cell applications for items such as cell phones or laptop computers. Calculate the density of methanol in Ib/ft' from a tabulated specific gravity, and determine the volume in cubic inches needed to contain 100 g of methanol. Strategy First, we will determine the specific gravity of methanol from Table B.1 of the textbook and use it to determine the density. Once the density is determined, unit conversions can be used to determine the required volume. Solution Table B.1 lists the specific gravity of methanol as 0.792. Thus, the density is given as: Payn = (0.792) (62.43-- lb The volume is calculated from the mass divided by the density. Thus, 100g 1 lb 454g . ft' in V = Ib ft in (b) Liquid butane can be used in portable fuel cell applications for items such as cell phones or laptop computers. If the density of butane is 37.5 determine its specific gravity and Ib ft' determine the volume in cubic inches needed to contain 220 g of butane. Strategy First, we will determine the specific gravity of butane from the given and reference densities. Once the density is determined, unit conversions can be used to determine the required volume. Daniel López Gaxiola Jason M. Keith Student View Supplemental Material for Elementary Principles of Chemical Processes Solution The specific gravity is given as: Ib 37.5 SG = Pudes Ib ft SG SG = The volume is calculated from the mass divided by the density. Thus, 220g 1lb V= ft' 12' in' g. Ib. f" V = in