Download 1 ChE 505 WORKSHOP 1 1. Why are chemical reactions important

ChE 505
WORKSHOP 1
1.
Why are chemical reactions important to environmental engineering? Name as
many reasons as you can think of.
2.
What is a chemical reaction?
3.
What do we mean by reaction stoichiometry? What does stoichiometry
represent?
4.
What is a mole? What is the relationship between a kmol and mol? What is the
relationship between a lbmol and a mol?
5.
Progress of single reaction can be represented by a single molar extent of reaction.
What is the relationship between the initial moles of reactants and products, the
moles for each of the above after some reaction time, the stoichiometric
coefficients and reaction extent?
6.
Relate molar extent of reaction to the fractional conversion of the limiting
reactant. What is the limiting reactant?
7.
What is the relationship between mole fraction of various products and reactants
and reaction extent?
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8.
Extend the relationship developed in 5. to multiple reactions consisting of R
independent reactions between S species?
9.
What is the stoichiometric coefficient of an inert?
10.
In a set of R’ stoichiometric reactions between S species how would you
determine the set R of independent reactions?
11.
What is the rate of reaction?
12.
What does rate of reaction depend on?
13.
What is activation energy for the reaction? Can it be defined always?
14.
Which reaction rate increases more rapidly with temperature, the one with lower
or higher activation energy?
15.
What is the Arrhenius form of the rate constant?
16.
How can an n-th order reaction rate be represented.
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17.
Can the temperature and composition dependence term be separated in reaction
rates that follow the Languir-Hinshelwood form? Can an activation energy be
defined?
18.
What is molal internal energy?
19.
How is molal enthalpy defined?
20.
What is the standard heat of reaction?
21.
What is molal Gibbs free energy in terms of molal enthalpy and entropy?
22.
What is the condition for equilibrium in a reactive system?
23.
How is the thermodynamic equilibrium constant defined?
24.
How is the standard Gibbs free energy for reaction calculated and how does it
relate to the equilibrium constant?
25.
What is Van’t Hoff’s equation for variation of equilibrium constant with
temperature?
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26.
How can one calculate the heat of reaction as a function of temperature?
27.
Does the equilibrium constant have units?
28.
How does one relate activity to mole fraction? Activity to concentration?
29.
Calculate the equilibrium conversion of SO2 reacting with air at 25˚C and at
600˚Cfor a feed that contains
1) stoichiometric ratio of reactants
2) large excess of air.
Assume constant heat or reaction.
30.
How would you calculate the equilibrium constant for
2NO + O2 = 2NO2
At 25˚C and at 1000˚C.
What information do you need. Also for
N2 + O2 = 2 NO.
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