almost all gases have the same RVP at

A) same temperture and pressure

B) same critical temperture and critical pressure

C) at standard temperture and pressure

Question 3

Discuss the martensitic crystal structure and why martensite is very hard and brittle.

Question 4

1.Explain why fine pearlite forms under moderate cooling of austenite through the eutectoid temperature, whereas coarse pearlite is the product of slow cooling rates.

2.Which is more stable, the pearlitic or the spheroiditic microstructure? Justify your answer.

3.What is the function of alloying elements in tool steels?

4.Describe one problem that might occur with a steel weld that was cooled to rapidly.

Semiconductor microchip processing often involves with chemical vapor deposition (CVD). In this process a stream of Silane gas (SiH4) enters a reactor chamber, reacts with oxygen (O2) which comes to the chamber from another stream; this reaction results in production of silicon dioxide (SiO2) and hydrogen gas (H2). Silicon dioxide leaves the chamber in the form of solid thin film, but the rest of materials leave the chamber in gas phase. The chamber has rigid non insulated walls and it is fixed to the floor of the cleanroom.

In a cleanroom CVD reactor, we use the following procedure to fabricate thin films; a stream of Silane gas (SiH4) at 1.00 atm, 17.0 °C and volumetric flow rate of 12.57 gal/min enters the reactor. 25 % excess oxygen enters the system from another stream at 27.0 °C, 1.00 atm. Also, argon gas (Ar is an inert gas) is entering the system at 27.0 °C, 1.00 atm and its molar flow rate ratio to Silane’s molar flow rate is (5:1). If the temperature of the thin film is 850 °C, and all the gases that are leaving the chamber has the temperature of 397 °C. How much heat is transferred to/from our reactor in KW?

Reaction: SiH₄ (g) + O₂ (g) ---> SiO₂ (g) + 2H₂​ (g)

I know that the heat transfered from/to the reaction is equal to the change in enthalpy (Q= ΔH). The formula I would be using is ΔH= m ∫ Cp ΔT for each material in the equation. I just really need help on how to get the moles of each component (SiH₄, O₂, SiO₂, H₂, Ar) going in the reaction and coming out.

02: 720 Ib, /min of Freon HFC 134a undergoing a change in state from (400 Psia and 60 F) to 10 Psia and 60 F. estimate the change in S,H and V?

Compare the water quality of the natural water sample and tap water analyzed. Which quality parameters of natural water are significantly different from tap water? What quality parameters you measured in this lab are regulated by the National Primary Drinking Water Standards? Is the quality of the tap water in compliance with these standards? 3. (5107 only, bonus for 4107) Compare the results of sulfate measu

This is for a safety engineering class and the textbook used is Industrial Safety and Health Management by Asfahl & Rieske (7th Edition) but I use the 6th edition and it's the same.

What type of hazard analysis techniques are used for the following project stages? Give two examples for each.

1.) Research and Development

2.) Design

3.) Operation

Steam enters a turbine at a velocity of 200 m/s. The inlet conditions of the steam are at 4000 kPA and 500°C. The diameter of the inlet pipe is 50 mm. The outlet conditions of the steam are 80 kPa and a quality of 1.0. The diameter of the outlet pipe is 250 mm. Determine the turbine power output in kJ/s assuming the kinetic energy change and potential energy change are both negligible. Calculate the change in kinetic energy to show it is indeed negligible.

Explain the main components of a battery and how electricity is produced

Toluene vapors at 1.013 bar, 150°C, are cooled under constant pressure to a final temperature of 22°C. (a) Determine the amount of heat that must be removed (5) (b) How much heat must be removed if the final state is a vapor-liquid mixture that contains 60% vapor by mass. (5) Assume that Cp for vapor phase is a function of temperature, and for liquid toluene Cp is constant (= 155.96 J/(mol K)). The boiling temperature of toluene at 1.013 bar is 110.6°C, and standard heat of vaporization for toluene 38060 J/mol.

Calculate (using equation) and estimate (using figure) the following: a. Dc in FCC Fe at 912C b. Dc in BCC Fe at 912C c. DNi in FCC Fe at 912C Compare the two values for each case (one from equation and other from figure) and comment on any difference.

What is the process of acquiring white cast Fe, Gray cast Fe, ductile cast Fe and malleable cast Fe, as well as their carefully sketch microstructures?

For 1 kg of liquid water, determine the entropy change of the universe when the water is: Initially at 0 C, is heated to 50 C by contact with a thermal reservoir at 50 C and then to 100 C with a thermal reservoir at 100 C Assume Cp = 4.2 kJ/kg-K

1. A crusher was used to crush a material and the screen analysis of the product is:

Calculate the:

1. volume-surface mean diameter
2. arithmetic mean diameter
3. mass mean diameter
4. volume mean diameter.
5. specific surface area (mm²/g) and the total particles/g of  the sample given that the density of the particles is 0.00265 g/mm³, the shape factor and the sphericity are 2 and 0.571,respectively.

2. A spray-dried detergent has the following screen analysis:

1. Present this information in an undersize cumulative plot.
2. Determine the volume-surface mean and the volume-mean diameters.