Question

Question
1
Question
2
A)
The chemical potential energy of bond A is greater than the chemical potential energy of bond B.Which statement best explains this observation?
(1 point)
The atoms in bond A are held more tightly together than the atoms in bond B.
The atoms in bond A have fewer bonds between them than the atoms in bond B.
The atoms in bond A are farther apart than the atoms in bond B.
The atoms in bond A are larger than the atoms in bond B.
A)
Which statement about the bond energies of nitrogen, iodine, and fluorine gases is correct?
(1 point)
Fluorine gas and nitrogen gas have similar bond energies.
Iodine gas has the highest bond energy.
The atoms in fluorine gas are held together by a triple bond.
The bond in nitrogen gas is the most difficult to break.
Question
3
A)
Use the information in the table to answer the question
.
Chemical Bonds and theirCorresponding Bond Energies
Bond
Bond Energy (kJ/mol)
C–H
413
H–O
459
C–Cl
327
N–H
391
Which molecule has the greatest bond energy?
(1 point)
CCl
4
NH
3
H
O
2
CH
4
Question
4
Question
5
A)
The balanced equations for two reactions are shown.
1.
CH
+ N
+ H
→ CH
N + NH
2.
CH
+ I
→ CH
I + HI
Which statement best explains why reaction 1 requires a greater input of energy than reaction 2?
(1 point)
4
2
2
3
3
4
2
3
The number of bonds in the reactants in reaction 1 is greater than the number of bonds in the reactants inreaction 2.
The bond energy of the products in reaction 1 is less than the bond energy of the products in reaction 2.
The number of reactants in reaction 1 is greater than the number of reactants in reaction 2.
The bond energy of the reactants in reaction 1 is greater than the bond energy of the reactants in reaction2.
A)
Chlorine and bromine are in the same group in the periodic table. The bond energy of a Cl–Cl bondis 240 kJ/mol. The bond energy of a Br–Br bond is 190 kJ/mol. Which statement best explains thisdifference?
(1 point)
Bromine atoms are more likely than chlorine atoms to interact with other atoms.
Chlorine atoms form a double bond, and bromine atoms form a single bond.
Bromine has more electron levels than chlorine.
Chlorine atoms are larger than bromine atoms.

Answer 1

1) The atoms in bond A are held more tightly together than the atoms in bond B.

2) The bond in nitrogen gas is the most difficult to break. (N2 has a strong triple bond.)

3) CH4 (CH4 has four C–H bonds at 413 kJ/mol each, giving the largest total bond energy.)

4) The bond energy of the reactants in reaction 1 is greater than the bond energy of the reactants in reaction 2. (Breaking N≡N requires much more energy than breaking I–I.)

5) Bromine has more electron levels than chlorine. (More electron shells → larger atoms → longer/weaker Br–Br bond.)