virial equation. Then, calculate V at similar temperature and 75 bar.
In: Other
Describe an ecosystem that you are familiar with. Include examples of abiotic and biotic factors, producers, consumers, and decomposers. Describe at least two ways that humans have impacted this ecosystem, or similar ecosystems. What is the effect on biodiversity?
In: Other
Reactant A decomposes by three simultaneous reactions to form three products, one that is desired, B, and two that are undesired, X and Y. These gas-phase reactions, along with the rate laws, are as follows. (40pts) 1) A→X -r1A = rX= k1 = 0.0001 mol dm-3 sec-1 2) A→B -r2A = rB = k2 CA 2 = (0.0015 s-1 ) CA 2 3) A→Y -r3A=rY=k3 = 0.008 dm3 mol-1 sec-1 The specific reaction rates are given at 300 K and the activation energies for reactions (1), (2), and (3) are E1 = 10,000 kcal/mole, E2 = 12,000 kcal/mole, and E3 = 20,000 kcal/mole. (a) How, and under what conditions (e.g., reactor type(s), temperature, concentrations), should the reaction be carried out to maximize the selectivity of species B for an entering concentration of species A of 0.4 M and a volumetric flow rate of 2.0 dm3 /s? (b) Design the suitable type of reactor assuming there is no pressure drop.
In: Other
In: Other
Travel to the following locations using Google Earth Pro, Google maps or any other mapping software of your choice. Describe the primary landform process in each area and speculate briefly how each area came to look the way it does today! (0.8 marks)
(a) 39º 16’ 53”S 175º 33’ 57”E
(b) 02º46’52”S 60º 40’ 09”W
(c) 37º59’36”N 73º23’01”E
(d) 30º24’08”N 58º16’41”W
In: Other
Please type!
What is the most important think you learned about Green Buildings, Sprawl, and Sustainability Initiatives from the textbook? like a summary of it.
In: Other
In: Other
Q) The catalytic vapor deposition CCVD is one of the most important technique which applied to prepare various type of nanomaterial. These mate used in the production of various type of electronic devices on microscale .
Answer the following: (1) Explain the chemical vapor deposition process for preparing nanomaterials. (2) Make brief comparison between CVD and other conventional methods (3) One of the most important applications is the synthesizing silicon dioxide films which deposit with a uniform shape on substrate made of silicon wafers in the CVD reactor The input stream to the reactor at 25 °C consists of Silane and Oxygen in a ratio 6.0 to 1.0, respectively and the output product exit at 1102 degrees * C . SiH 4 (g)+O 2 (g) SiO 2 (s)+2H 2 (g) you can use the following data : ( Delta hat H f ^ ) SiH 4 (g) =-61.9kJ/mol , ( Delta hat H f ^ ) SiO 2 (s) =-851 kJ/mol (C p ) SiH 4 (g) [kJ/(mol* K)]=0.01118+12.2*10^ -5 T-5.548*10^ -8 T^ 2 +6.84*10^ -12 T^ 3 (C p ) SiO 2 (s) [kJ/(mol* K)]=0.04548+3.646*10^ -5 T-1.009*10^ 3 /T^ 2 Where the temperature in the heat capacity relation are applied in Kelvin .
Answer the following : ( a) Determine the amount in moles for the feed and the product taking 2m ^ 3 of gaseous as a basis to your calculations . Also , calculate the extent of reaction . ( b) Determine the standard heat of reaction using the heat of formation method and the heat of combustion method . (c) Determine the amount of heat absorbed or emerged from the CVD reactor . Is the given CVD reaction exothermic or endothermic ? (d ) Calculate rate of heat transfer in KW if you fed the reactor with 30m ^ 3 / h
In: Other
A 5,000 mol/h fuel is fed to a furnace and burned with excess air. The fuel contains 80.0 mole % carbon (C), 15.0 mole % hydrogen (H) and the remainder sulphur (S). The ratio of feed fuel to feed air is 1:7. The selectivity of carbon dioxide (CO2) to carbon monoxide (CO) production is 12. The conversion of fuel in this process is only 80%. One of the components in the flue gas is sulphur dioxide (SO2).
(a) Write all equations that involved in this
combustion process.
(b) Draw and label the process completely.
(c) Using Atomic Species Balance method, determine the molar flow
rates (mol/h) of all components in the product. stream.
(d) Determine the percentage of excess air in this process.
In: Other
A water stream at a mass flow rate of 0.3 kg/s and temperature of 70°C flows through an aluminum horizontal pipe with an inner diameter of 0.025 m, wall thickness of 3 mm and length of 2 m. The ambient air is at 25 °C and the outlet temperature of water is 65 °C. Assume steady-state conditions are reached and temperature of air is constant.
Given data: Re= 4?̇/µ??,
NuD= 1.86 ( Re*Pr / (L/D) ) 1/3 ; Re < 2300
NuD=0.023*Re4/5Pr0.3 ; Re >10 000
hair = 12 W/m2K
kAl = 237 W/mK
kwater = 0.66 W/mK
Cp,water= 4190 J/kg K
µwater= 0.4125.10-3 kg/ms
a) Determine the rate limiting step for this system by comparing the thermal resistances.
b) Calculate the change in the total resistance when one of the resistances is halved while the others are held constant? Repeat your calculation for each resistance.
In: Other
define and compare errors of omission and errors of commission. discuss these terms in the light of geoengineering.
In: Other
In: Other
Please explain:
What are all the big factors that influence Earth’s climate? (i.e., plate movement, sunspot cycles, etc., there are more; know them all)
In: Other
17) What is the difference between basalt and gabbro?
18) What is the difference between basalt and rhyolite?
19) Metamorphosed limestone is:
20) Identify the following rock type and subspecies within the rock types:
andesite
rock salt
granite
sandstone
gneiss
rhyolite
gabbro
schist
marble
quartzite
limestone
conglomerate
shale
slate
21) What is the rock cycle? A cycle that describes:
22) What aspects of sedimentary rocks could be used to reconstruct past environments?
23) What are found in sedimentary rocks that record the history of life on Earth?
In: Other