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.

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??,

Nu_D= 1.86 ( Re*Pr / (L/D) ) ^1/3 ; Re < 2300

Nu_D=0.023*Re^4/5Pr^0.3 ; Re >10 000

h_air = 12 W/m²K

k_Al = 237 W/mK

k_water = 0.66 W/mK

Cp,water= 4190 J/kg K

µ_water= 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.

define and compare errors of omission and errors of commission. discuss these terms in the light of geoengineering.

distaltion

• Explain how rocks respond to those stresses within the Earth's crust by brittle, elastic, or plastic deformation, or by fracturing
• Summarize how rocks become folded
• Describe the conditions under which rocks fracture
• Briefly describe the different types of faults, including normal, reverse, thrust, and strike-slip

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)

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?

Oranges are very susceptible to cold weather, and long exposure to subfreezing temperatures can destroy them. Consider an 8 cm diameter orange (assume it is an idealised sphere) that is initially at 15oC. A cold front moves in one night, and the ambient temperature suddenly drops to -8.5oC, with a heat transfer coefficient of 7 W m-2 K−1 . Using the properties of water for the orange and assuming the ambient conditions to remain constant for 2.5 hours before the cold front moves out, determine temperatures at: ro = 0.0 cm (i.e., centre of the orange); ro = 1.0 cm; ro = 2.0 cm; ro = 3.0 cm; ro = 4.0 cm

1. Determine ionic strength, I and mean ionic activity coefficient, γ± at 298 K for

1. 0.025 molal K₂SO₄
2. 0.01 molal Li₂CO₃
3. 0.01 molal Ca₂(PO₄)₂

2. Estimate the solubility of

1. MgF₂ (K_sp=6.4x10^-9) in an aqueous solution with I=0.003 molal.   
2. BaSO₄ (K_sp=1.08x10^-10) in an aqueous solution with I=0.001 molal.   

What are the names of the planets in order from the Sun outward?

What caused this difference to occur?

What was the Earth like when it first formed?

How is it different today?

What are the three main layers of the Earth based on chemical composition?

What are the five layers of the Earth based on physical characteristics?

How did these layers originally form?

What are the two most voluminous element is the Earth’s crust?

What are the two kinds of crust? What is the igneous rock that makes up each layer called?

What is the main difference between them, that makes them act so differently?

What was the basic composition of the early atmosphere?

What had to change in the atmosphere before life could evolve?

What were the first organisms’ food come from?

What type of organisms make most of the food for the basis of the food chain today?

What is the basic history of organisms’ evolution on Earth?

What is the study of geology?

How is environmental geology defined?

Why study environmental geology?

What is carrying capacity?

Who is the population on Earth effected by environmental geology?

Define:

Scientific method

Hypothesis

Theory

What are some of the environmental issues influenced by population growth?

Hawaiian

• Location (e.g., what can be grown there because of the climate, soils, etc.)
• Culture (e.g., what is acceptable or not acceptable to eat or drink because of customs, religions, etc.)
• Human/environmental interactions (e.g., how the environment and culture have interacted to produce what is on your plate)
• Movement (e.g., whether items can be readily purchased due to globalization)

In this journal you are asked to take the role of a mayor or congressional representative with a mandate to reduce energy consumption. You should describe ways in which government policy can encourage people to reduce energy consumption. Examples might include improving public transportation, instituting a tax , or providing a subsidy. For example. the city might build a subway system or institute a carpooling initiative. You should describe the feasibility of the initiative.