What does it mean for example: 100% of methane and oxygen entering are consumed by reactions 1 and 2..

Or another example... 95% of hydrogen entering is consumed...

cavitation is caused by ?

A) High pressure

B) High viscosity

C) high what ???

what is the purpose of prime pumping ?

calculate the reactions conversion percent (by hand and solver in excel) to be able to find good result in aspen in producing Ethylene oxide. The given reactions are:

C2H4+ 0.5O2 --> C2H4O

C2H4+ 3O2 --> 2CO2+2H2O

C2H4O + 2.5O2 --> 2CO2+2H2O

Along with stream data (COMPONENT FLOWRATES (Kmol/h) related to first and second reactors as followed:

First reactor input

Ethylene    --> 1047.91                          

Ethylene oxide --> 6.47

Carbon dioxide--> 31.71

Oxygen --> 6331.12

Nitrogen --> 28,191.39

Water --> 30.98

First reactor output:

Ethylene    --> 838.67

Ethylene oxide --> 206.79

Carbon dioxide --> 49.56

Oxygen --> 6204.19

Nitrogen --> 28,191.39

Water --> 48.82

Second reactor output:

Ethylene --> 670.64                          

Ethylene oxide --> 175.83

Carbon dioxide --> 63.44

Oxygen --> 6101.72

Nitrogen --> 28,188.72

Water --> 77.13

What is the difference between an Environmental Assessment (EA) and Environmental Impact Statement?

What data is required to generate a pump curve (head versus flow rate and pump efficiency versus flow rate) at different speeds ofa centrifugal pump?

At the end of basic oxygen heat, the FeO content of the slag is approximately 20% which corresponds to a mole fraction of 0.165. Assuming that the activity coefficient of FeO in the slag is unity and that the slag and finished steel are in equilibrium at 1600oC, estimate the carbon content of the metal bath. Assume dilute solution and total pressure of 1 atm.

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

suppose mercury instead of water was used as the manometer fluid . How would this effect the accuracy of the measurement?

Calculate the emissions reduction if a natural gas power plant is converted to biogas. 81 % of the biogas emissions are absorbed by regrowing the source material.
Fuel properties:
• methane content of Natural gas: 72 %
• calorific value of methane: 55 GJ/t
• ethane content of Natural gas: 20 %
• calorific value of ethane: 51 GJ/t
• remainder of Natural gas is CO2
• methane content of biogas: 54 %
• remainder of biogas is CO2
Calculate the percentage savings (e.g., if natural gas emitted 200 units of CO2 and the resulted in a net emission of 120 units, then the percentage savings would be (200-120)/200 = 40%).
Give the answer in % rounded to the nearest ±1%

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.