Estimate the diffusivity of acetic acid diffusing through air at 298 K at 2 atm using the Fuller- Schetller-Giddings method.

Q2 / Propane is separated from propylene by distillation . The compounds have close boiling points and the relative volatility will be low . For a feed composition of 15 per cent w / w propane , 90 per cent w / w propylene , estimate the number of theoretical plates needed to produce propylene overhead with a minimum purity of 98.5 mol per cent . The column will operate with a reflux ratio of 15. The feed will be at its boiling point . Take the relative volatility as constant at 1.1 .

When an electron is excited from n=2 to n=6, a photon of violet light is absorbed. If an electron on a Li^2+ ion is absorbed from n=4, which energy level must it rise to for violet of a similar wavelength is absorbed?

One integrated circuit design calls for the diffusion of arsenic into silicon wafers; the background concentration of As in Si is 2.5 × 1020 atoms/m³. The predeposition heat treatment is to be conducted at 1000°C for 45 minutes, with a constant surface concentration of 8 x 1026 As atoms/m³. At a drive-in temperature of 1100°C, determine the diffusion time required for a junction depth of 1.2 μm. For this system, values of Qd and Do are 4.10 eV and 2.29 × 10-³ m²/s, respectively. hours

Which of the following statements is correct regarding TCD detector?

Q2:. (a) For a free electron with a velocity of lo7 cm/s, what is its de Broglie wavelength. (b) In GaAs, the effective mass of electrons in the conduction band is 0.063 mo. If they have the same velocity, find the corresponding de Broglie wavelength.

Explain how to determine the theoretical singularity using the McCabe-Thiele method in continuous fractional distillation. Specifically, use the y-x diagram to specify the names of the required lines and the coordinates of the intersections.

Liquid phase sintering is used for WC–Co compacts, even though the sintering temperatures are below the melting points of either WC or Co. How is this possible?

Research for the boiling point of the following mixture of compounds. Encircle which would boil first. Finally, indicate what type of distillation will you use to separate them.

For each unknown liquid, predict, based upon structure, if the molecule is polar or nonpolar. Explain your answer. Research and list in a table format include the boiling points (1 atm) and heat of vaporization (at 25oC) for each substance.   Unknown Liquids: Toluene, n-Butanol, Hexane, ethylene glycol, acetone, hydrogen oxide