In an experiment on diffusivity, a tube of small diameter contained acetone at 25•C up to 1.35 cm height measured from the top. A gentle current of air was passes over the tube. The level of acetone in the tube has fallen to 2.85 cm (from top) after 6 hours. The barometric pressure was 752 mm and the vapor pressure of acetone 187 mm Hg. Determine the diffusivity of acetone in air at 25 C. What will be this diffusivity at 50C and 3 atmosphere total pressure? Density of acetone = 0.78 , molecular weight of acetone = 58.

QUESTION 1 Later on in the course, you will learn how to use the Navier-Stokes equations to predict the flow behaviour of Newtonian fluids in various systems with fairly simple geometries. Below is a schematic for the pressure-driven flow of a Newtonian fluid in the annular space between two concentric cylinders - the inner cylinder has radius Ri and the outer cylinder has radius Ro. PO>PL • the applied pressure (AP) Four of your colleagues attempted to solve the Navier-Stokes equations to determine an expression for Q, the volumetric flow rate of fluid, in terms of the following parameters: the length of the annular space (Z) the viscosity of the fluid (μ) Unfortunately they each came up with a different expression for Q: Q TR² AP πR ΔΡ -|- -|- Q = 8μ L 8μ L * Ro Z AP -A1-(-)* 8μ L Ro ¹ (R₂) In 2R₁2R0 ¹-(₂)]²* ¹ (R₂) In Q TRAP 8μ L -(.*. R₁ Ro [p()] (R₂) Ro In 1- (+)²] ² (Ro R₁ In Using a dimensional analysis, determine which (if any) of the four might be the correct equation for Q.

Temperatures (°C) are measured at various points on a heated plate, which are reported in the following table. Estimate the temperature when X=4 and Y=3.2, X=4.3 and Y=2.7 by Lagrange polynomial. Image Help with this problem please, we are working using only X and Y data, but never anything more than this so I don't know how to apply the formulas when we are given more data and I am confused for this task.

What is the Gibbs phase rule for the general system?