Please answer the following 6 questions below 1. Consider the following electronegativity values: Cl = 3.2, Si = 1.9, Ba = 0.9, Al = 1.6 When calculating the types of bonds these atoms can make, all of the following conclusions are true EXCEPT: a. The bond between Ba and Cl is expected to be ionic b. The bond between Cl and Si is expected to be polar covalent c. The bond between Al and Si is expected to be nonpolar covalent d. The bond between Al and Cl is expected to be ionic 2. Draw the lewis structures for both resonance structures of the OCBr+ ion and select the statement that is true a. The molecule sometimes looks like one resonances structure, and
Thermochemistry
Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.
Exergonic Reaction
The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.
Please answer the following 6 questions below
1. Consider the following electronegativity values:
Cl = 3.2, Si = 1.9, Ba = 0.9, Al = 1.6
When calculating the types of bonds these atoms can make, all of the following conclusions are true EXCEPT:
a. The bond between Ba and Cl is expected to be ionic
b. The bond between Cl and Si is expected to be polar covalent
c. The bond between Al and Si is expected to be nonpolar covalent
d. The bond between Al and Cl is expected to be ionic
2. Draw the lewis structures for both resonance structures of the OCBr+ ion and select the statement that is true
a. The molecule sometimes looks like one resonances structure, and at other times it looks like the other resonance structure
b. In one resonance structure, the carbon is in the center, and in the other one, the oxygen is in the center
c. The bond between carbon and oxygen would best be described as 2.5 bonds (halfway between a double and a triple bond)
d. In one resonance structure the positive charge is on the bromine, and in the other, it is on the carbon.
3. Which of the following is the correct equations for the reaction of sulfur tetrafluoride?
a. S + 4F --> SF4
b. 2S + 4F --> 2SF2
c. S + 2F2 --> SF4
d. S + 4F --> S + 2F2
e. SF4 --> S + 2F2
f. 2SF4 --> S2 +4F2
g. none of the above
4. What is the correct equation for the reactions of CH4 and O2?
a. CH4 + O2 --> CO2 + 2H2
b. CH4 + 2O2 --> CO2 + 2H2O
c. CH4 + O2 --> C + 2H2O
d. CH4 + O2 --> CH4O2
e. CH4 + O2 --> CH2O + H2O
f. CH4 + O2 --> C+ 2H2 + O2
g. none of the above
5. Which of the following is the correct equation for the reaction of calcium nitrate with ammonium fluoride?
a. Ca(NO2)2 + 2NH4F --> CaF2 + 2NH4NO2
b. CaNO3 + 2NH4F --> CaF2 + 2NH4NO3
c. Ca(NO3)2 + 2NH4F --> 2NH4NO3 + CaF2
d. 2Ca(NO3)2 + NH4F2 --> 2CaF2 + NH4(NO3)2
e. Ca(NO3)2 + NH4F --> CaF2 + NH4NO3
f. Ca(NO3)2 + 2NH4F --> Ca(NH4)2 + 2FNO3
g. none of the above
6. Which of the following pictorially represents the following reaction:
N2 + 3H2 --> 2 NH3
(Look at the picture below)
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