Methane is completely burned with 250% excess air during a steady flow combustion process. If the reactants and the products are kept at 25 ° C and 1 atmosphere and the water of the products exists in liquid form.
Determined:
to. The balanced equation
b. Heat transfer (kJ / kmol)
c. Adiabatic flame temperature (K)

Question 1: Use specimens to fill in the following table. Provide the specimen name(s) that you are using as a reference for each species (Homo species only). For most questions provide a briefdescription of the trait (1-2 sentences at most). For questions that ask about presence of a trait, simply indicate if this trait is present or absent for each species. For some questions, you may find it helpful to rank the trait across the species.

Question 2: Describe 2 trends that you observe from these species as they related to evolutionary change in our genus over time. For example, one trend that you can describe is how brain size has changed over time.

1)

2)

Question 3: List (a) two derived features of Homo neanderthalensis and (b) two derived features of Homo sapiens.

a)

b)

The production of ethyl acetate occurs in a batch reactor with two raw materials, ethanol and acetic acid, as shown with the following reaction: ??2??5???? + ????3???????? ? ????3????????2??5 + ??2??

The reaction may be written simply in the form of: ?? + ?? ? ?? + ??

The reaction rate in the liquid phase is given by: ???? = ??1???????? At 100°C: ??1 = 7.93 × 10?6 m3kmol?1 s ?1

A feed of 38.4% by weight of acid, 50% by weight of alcohol, and no ester is used to promote a 35% conversion of the acid. The density of the mixture can be assumed to remain constant at 1020 kg m?3 . The daily production rate for the production of ethyl acetate is 50 metric tonnes and the reactor will be operated 24 hours a day with the time for filling, emptying, cleaning is 1 hour total for each batch.

Determine the following:

a) Initial and final concentration of each species (don’t forget about the water) [6 marks]

b) Batch reaction time [6 marks]

c) Number of batches per day [4 marks]

d) Reactor volume for required daily production [4 marks]

DATA:

Molecular Weight of Component

A 46 kg kmol?1

B 60 kg kmol?1

R 88 kg kmol?1

S 18 kg kmol?1

Decide whether each of these statements is True (T) or False (F).
A closed-loop control system:
(i) Has negative feedback.
(ii) Responds to changes in conditions.
1. (i) T (ii) T
2. (i) T (ii) F
3. (i) F (ii) T
4. (i) F (ii) F
7. Decide whether each of these statements is True (T) or False (F).
A closed-loop control system:
(i) Has a measurement system which gives feedback of a signal which is a measure of the variable being controlled.
(ii) Has a controller which has an input based on the difference between the set value and the fed back value for the variable being controlled.
1. (i) T (ii) T
2. (i) T (ii) F
3. (i) F (ii) T
4. (i) F (ii) FDecide whether each of these statements is True (T) or False (F).
A closed-loop control system:
(i) Has negative feedback.
(ii) Responds to changes in conditions.
1. (i) T (ii) T
2. (i) T (ii) F
3. (i) F (ii) T
4. (i) F (ii) F
7. Decide whether each of these statements is True (T) or False (F).
A closed-loop control system:
(i) Has a measurement system which gives feedback of a signal which is a measure of the variable being controlled.
(ii) Has a controller which has an input based on the difference between the set value and the fed back value for the variable being controlled.
1. (i) T (ii) T
2. (i) T (ii) F
3. (i) F (ii) T
4. (i) F (ii) FDecide whether each of these statements is True (T) or False (F).
A closed-loop control system:
(i) Has negative feedback.
(ii) Responds to changes in conditions.
1. (i) T (ii) T
2. (i) T (ii) F
3. (i) F (ii) T
4. (i) F (ii) F
7. Decide whether each of these statements is True (T) or False (F).
A closed-loop control system:
(i) Has a measurement system which gives feedback of a signal which is a measure of the variable being controlled.
(ii) Has a controller which has an input based on the difference between the set value and the fed back value for the variable being controlled.
1. (i) T (ii) T
2. (i) T (ii) F
3. (i) F (ii) T
4. (i) F (ii) FDecide whether each of these statements is True (T) or False (F).
A closed-loop control system:
(i) Has negative feedback.
(ii) Responds to changes in conditions.
1. (i) T (ii) T
2. (i) T (ii) F
3. (i) F (ii) T
4. (i) F (ii) F
7. Decide whether each of these statements is True (T) or False (F).
A closed-loop control system:
(i) Has a measurement system which gives feedback of a signal which is a measure of the variable being controlled.
(ii) Has a controller which has an input based on the difference between the set value and the fed back value for the variable being controlled.
1. (i) T (ii) T
2. (i) T (ii) F
3. (i) F (ii) T
4. (i) F (ii) FDecide whether each of these statements is True (T) or False (F).
A closed-loop control system:
(i) Has negative feedback.
(ii) Responds to changes in conditions.
1. (i) T (ii) T
2. (i) T (ii) F
3. (i) F (ii) T
4. (i) F (ii) F
7. Decide whether each of these statements is True (T) or False (F).
A closed-loop control system:
(i) Has a measurement system which gives feedback of a signal which is a measure of the variable being controlled.
(ii) Has a controller which has an input based on the difference between the set value and the fed back value for the variable being controlled.
1. (i) T (ii) T
2. (i) T (ii) F
3. (i) F (ii) T
4. (i) F (ii) FDecide whether each of these statements is True (T) or False (F).
A closed-loop control system:
(i) Has negative feedback.
(ii) Responds to changes in conditions.
1. (i) T (ii) T
2. (i) T (ii) F
3. (i) F (ii) T
4. (i) F (ii) F
7. Decide whether each of these statements is True (T) or False (F).
A closed-loop control system:
(i) Has a measurement system which gives feedback of a signal which is a measure of the variable being controlled.
(ii) Has a controller which has an input based on the difference between the set value and the fed back value for the variable being controlled.
1. (i) T (ii) T
2. (i) T (ii) F
3. (i) F (ii) T
4. (i) F (ii) FDecide whether each of these statements is True (T) or False (F).
A closed-loop control system:
(i) Has negative feedback.
(ii) Responds to changes in conditions.
1. (i) T (ii) T
2. (i) T (ii) F
3. (i) F (ii) T
4. (i) F (ii) F
7. Decide whether each of these statements is True (T) or False (F).
A closed-loop control system:
(i) Has a measurement system which gives feedback of a signal which is a measure of the variable being controlled.
(ii) Has a controller which has an input based on the difference between the set value and the fed back value for the variable being controlled.
1. (i) T (ii) T
2. (i) T (ii) F
3. (i) F (ii) T
4. (i) F (ii) FDecide whether each of these statements is True (T) or False (F).
A closed-loop control system:
(i) Has negative feedback.
(ii) Responds to changes in conditions.
1. (i) T (ii) T
2. (i) T (ii) F
3. (i) F (ii) T
4. (i) F (ii) F
7. Decide whether each of these statements is True (T) or False (F).
A closed-loop control system:
(i) Has a measurement system which gives feedback of a signal which is a measure of the variable being controlled.
(ii) Has a controller which has an input based on the difference between the set value and the fed back value for the variable being controlled.
1. (i) T (ii) T
2. (i) T (ii) F
3. (i) F (ii) T
4. (i) F (ii) FDecide whether each of these statements is True (T) or False (F).
A closed-loop control system:
(i) Has negative feedback.
(ii) Responds to changes in conditions.
1. (i) T (ii) T
2. (i) T (ii) F
3. (i) F (ii) T
4. (i) F (ii) F
7. Decide whether each of these statements is True (T) or False (F).
A closed-loop control system:
(i) Has a measurement system which gives feedback of a signal which is a measure of the variable being controlled.
(ii) Has a controller which has an input based on the difference between the set value and the fed back value for the variable being controlled.
1. (i) T (ii) T
2. (i) T (ii) F
3. (i) F (ii) T
4. (i) F (ii) F

The azeotrope of the benzene-cyclohexane system has a composition of 53.2 mol% benzene with a boiling point of 350.6 K at 101.3 kPa. At this temperature the vapour pressure of benzene (1) is 100.59 kPa and the vapour pressure of cyclohexane (2) is 99.27 kPa. Determine the activity coefficient for the solution containing 10 mol% benzene

A 30.0-liter cylinder of gas containing 97.0 mole % CO and 3.0% CO₂ is delivered to your plant. You sign the receipt for it, noting that the gauge on the tank reads 2000 psi. Several days later you notice that the gauge reads 1875 psi, indicating a leak. The storage room in which the cylinder is kept has a volume of 24.2 m³ and is very poorly ventilated. Calculate the maximum mole% of CO in the room at the time the leak is discovered, assuming that the leaking gas spreads uniformly throughout the room and the room temperature is constant at 30^oC. Use Kay’s rule if appropriate.

Hint: You will need to use Kay’s rule/assumption. Compressibility factors work great for this problem.

A power plant burns 7.3 tonnes (i.e., 7.3*1000 =7300 Kg) coal per hour and discharges the combustion products through a stack of effective stack height of 75m. The coal has a sulfur content of 4.2% and the wind velocity at the top of the stack is 6 m/sec. The atmospheric conditions are moderately stable. Answer Determine SO2 concentrations for following locations: (0,0,0); (850m, 0,0); (850m, 0,75m); (850m, 0,-75m); (-850m, 0,75m); (0, 0,75m); (850m, ?y, ?z). (ii) Determine distance from stack at which the maximum occurs.

complete a 2 page paper answering this question: What changes will you implement in your personal life in order to be a more accepting and understanding individual?

Explain how to apply formula of Solid-liquid equilibrium in thermodynamics.

Naphthalene is commonly used as a repellent against moths to protect clothing during storage. Consider a 1 cm diameter spherical naphthalene ball hanging in a closet at 25 oC. The density and vapour pressure of naphthalene at 25 oC are 1100 kg/m3 and 11 Pa, respectively and mass diffusivity of naphthalene in air at 25 oC is 0.61 x 10-5 m2/s.

a. consider the variation of diameter with time, determine how long it will take for the naphthalene to sublimate completely.

b. If instead of being stored in a closet, the naphthalene is exposed to dry air flowing at a velocity of 2 m/s. Both the naphthalene and the air were kept at 25 oC. It is observed that 12 g of naphthalene has sublimated in 15 min. Determine the mass transfer coefficient and the flux for mass transfer from naphthalene.

How can a mass and energy balance of a cement ball mill be written/expressed?

#1 A) Are the solutions made from these compounds acidic, basic or neutral solutions?

a. NaF b. RbCl c. Sn(NO3) d. MgS e. CrI3

#1 B) Acid/base strength

a. Put these in order of increasing basicity

CO3-2, I-, NH2-, HSO4-, OH-, NO3-

b. Put these in order of increasing acidity

HI, NH3, HCO3-, HF, H2O, HClO4

Calculate the density (in g/cm³) of an AX compound given that it has the rock salt crystal structure and that the radii of the A and X ions are 0.137 and 0.241 nm, respectively. Assume atomic weights of 30.7 and 100.2 g/mol for the A and X elements, respectively.

Two moles of gas are confined in a piston–cylinder device. Initially, the temperature is at 300 K and the pressure is 1 bar. The gas is compressed isothermally to 5 bar. If the ideal gas heat capacity is C ig P = 7R/2, find Q, W, ?U, ?H, and ?S if:

(a) the gas is ideal, or

(b) the gas satisfies the van der Waals equation of state with a = 5.0 × 106 bar · cm6/mol2 and b = 30 cm3/mol.

(c) Comment on the differences