Question

TiO2(s) ?H

Answer #1

TiO2 + 2C -> + Ti + 2CO Hf = -110.5

m = 12 kg of C

m = 45 kg TiO2

m = 7.5 kg Ti

a) limiting reactant and Theoretical Yield of Ti

for the limiting reactant, we need the balanced equation

TiO2 + 2C -> + Ti + 2CO

1 mol of TiO2 will react with 2 mol of C to form 1 mol of Ti and 2 mol of CO

change all masses to moles

m = 12 kg of C

n = m/MW = 12 kg of C / 12 kg/kmol of C = 1kmol of C

m = 45 kg TiO2

n = m/MW = 45 kg / 79.8 kg/kmol = 0.56 kmol of TiO2

Relationship is 1 mol of TiO2: 2 mol of CO

0.56 mol will need : 1.12 mol of C which we DONT have

**Carbon is the limiting reactant!**

Now calculating the theoretical yield

% yield = Actual Yield/Theoretical Yield * 100%

Theoretical Yield = if ALL the limiting reactant is going to be reacted to form the products, that is... if the 1 kmol of C is consumed... you should get:

calculate moles of Ti produced

n = m/MW = 7.5 kg of Ti / 47.86 kg/kmol = 0.156 kmol of Ti are produced

Lets get back to yield...

in theory... Ratio of 2 mol of C : 1 mol of Ti

But we have 1 kmol:0.5 kmol of Ti

The theoretical Yield should be 0.5 kmol of Ti (insted of the 0.15)

% yiel = real/theoretical *100% = 0.15/0.5 * 100% = 0.3*100 = 30%

% yield = 30%

b) Volume if P=1.1 bar and T = 50

Determine the heat of reaction for the process:
TiO2+ 4HCL---------> TiCl4+ 2H2 + O2
Using the information below
Ti + O2-------> TiO2 Delta H = -939.7 Kj
2 HCL-----------> H2 + Cl2 Delta H = -184.6
Ti + 2 Cl2-------------> TiCl4 Delta H= -804.2

The white pigment TiO2 is prepared by the reaction of titanium
tetrachloride, TiCl4, with water vapor in the gas phase. TiCl4(g) +
2H2O(g)TiO2(s) + 4HCl(g) How much heat is involved in the
production of exactly 3.15 mol of TiO2(s) under standard state
conditions?

Both oxidation and reduction occur in a TiO2 photocatalysis
system.
(a) Explain why TiO2 photocatalyst has both oxidation and
reduction ability
(b) List three oxidants which are involved in the photocatalytic
oxidation of organic pollutants by TiO2 under light
irradiation.
(c) Discuss why the quantum efficiency of TiO2 photocatalysis is
quite low in all applications.

The combustion of titanium with oxygen produces titanium
dioxide: Ti (s) + O2(g) → TiO2 (s) When 2.060 g of titanium is
combusted in a bomb calorimeter, the temperature of the calorimeter
increases from 25.00 °C to 91.60 °C. In a separate experiment, the
heat capacity of the calorimeter is measured to be 9.84 kJ/K. The
heat of reaction for the combustion of a mole of Ti in this
calorimeter is ________ kJ/mol.

Substance
S(subscript)298, J/K
cp, J/(K mol)
BaO
72.1
55.0
TiO2
50.6
75.0
BaTiO3
107.9
120.0
Calculate the entropy change for the reaction as a function of
temperature for the reaction, BaO + TiO2 = BaTiO3

If you are provided 4.00 kg of TiO2, 1.00 kg of C and 2.00 kg of
Cl2, what mass of TiCl4 could be produced in the reaction shown
below? (Hint: First identify the limiting reactant.) ___ TiO2(s) +
___ C(s) + ___ Cl2(g) → ___ TiCl4(g) + ___ CO(g) (not balanced: do
this first)
show any work

A uniform film of TiO2, 1036 nm thick and having index of
refraction 2.62, is spread uniformly over the surface of crown
glass of refractive index 1.52. Light of wavelength 545 nm falls at
normal incidence onto the film from air. You want to increase the
thickness of this film so that the reflected light cancels.
(B)After you make the adjustment in part (a), what is the path
difference between the light reflected off the top of the film and...

Problem 3. Let S be a subspace of a
Hilbert space H. Prove that
(S⊥)⊥ is the smallest closed
subspace of H that contains S

Calculate the Coulomb attraction between the atoms of the
following salts.
Cesium Chloride (CsCl)
Rutile (TiO2)
This is all the information that was given. I wasn't sure how to
find the radius. K should be a constant that equals 9.00*10^9 Nm^2
C^-2.

H(s)= s(s+100)^2 /(s+1)
scetch the bode plot for mag and phase

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