1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
alexandr1967 [171]
3 years ago
5

Sighting along the C2-C3 bond of 2-methylbutane, the least stable conformation (Newman projection) has a total energy strain of

______kJ/mol

Chemistry
1 answer:
natima [27]3 years ago
3 0

Answer:

21 KJ/mol

Explanation:

For this question, we have to start with the <u>linear structure</u> of 2-methylbutane. With the linear structure, we can start to propose all the <u>Newman projections</u> keep it in mind that the point of view is between carbons 2 and 3 (see figure 1).

Additionally, we have several <u>energy values for each interaction</u> present in the Newman structures:

-) Methyl-methyl <em>gauche: 3.8 KJ/mol</em>

-) Methyl-H <em>eclipse: 6.0 KJ/mol</em>

-) Methyl-methyl <em>eclipse: 11.0 KJ/mol</em>

-) H-H <em>eclipse:</em> 4.0 KJ/mol

Now, we can calculate the energy for each molecule.

<u>Molecule A</u>

In this molecule, we have 2 Methyl-methyl <em>gauche </em>interactions only, so:

(3.8x2) = 7.6 KJ/mol

<u>Molecule B</u>

In this molecule, we have a Methyl-methyl <em>eclipse </em>interaction a Methyl-H <em>eclipse </em>interaction and an H-H <em>eclipse</em> interaction, so:

(11)+(6)+(4) = 21 KJ/mol

<u>Molecule C</u>

In this molecule, we have 1 Methyl-methyl <em>gauche </em>interaction only, so:

3.8 KJ/mol

<u>Molecule D</u>

In this molecule, we have three Methyl-H <em>eclipse </em>interaction, so:

(6*3) = 18 KJ/mol

<u>Molecule E</u>

In this molecule, we have 1 Methyl-methyl <em>gauche </em>interaction only, so:

3.8 KJ/mol

<u>Molecule F</u>

In this molecule, we have a Methyl-methyl <em>eclipse </em>interaction a Methyl-H <em>eclipse </em>interaction and an H-H <em>eclipse</em> interaction, so:

(11)+(6)+(4) = 21 KJ/mol

The structures with higher energies would be less stable. In this case, structures B and F with an energy value of 21 KJ/mol (see figure 2).

I hope it helps!

You might be interested in
How many moles of carbon (C) are there in 92.5 g of C?
aksik [14]

Answer:

c are there 93.5 of c yan siguro

8 0
2 years ago
HELP THIS IS SCIENCE I HAVING TROUBLE
muminat

Answer:

1/2 of the way down

Explanation:

8 0
2 years ago
Read 2 more answers
At which of the following temperatures does all molecular motion stop
Kamila [148]
All molecular motion stop at 0 k wich is zero kelvin. At absolute 0 it stops. The temperature of 0 entropy at which all molecular motion stops equals in centigrades to -273.15° C which is the same as 0 in kelvin degrees. Have in mind that t<span>emperature is a measure of the average kinetic energy of the </span>molecules<span> in a material.</span>
3 0
3 years ago
Apakah biodiversiti ? ​
inna [77]
Biodiversiti adalah kehidupan di dunia termasuk manusia, hewan dan tumbuhan
6 0
2 years ago
What material was added to powdered rock during tuttle and bowen's experiments?
Rzqust [24]

Answer:

water was added to powdered rock

Explanation:

4 0
2 years ago
Other questions:
  • What is the difference between the ground state and excited state for an atom
    11·1 answer
  • If 23.4 grams of hydrogen gas were produced by the reaction below, how many grams of aluminum chloride were produced?
    15·1 answer
  • If the complete conversion of 1.383g of XI2 results in the formation of 0.564g of XCl2,what is the atomic mass of the element X
    9·1 answer
  • Below are the structures of three fatty acids, palmitic acid, stearic acid, and oleic acid. what combination of these fatty acid
    14·2 answers
  • On a warm summer day in Oslo, the temperature is 21 degree C and the relative humidity is 70%. What is the absolute humidity? Wh
    14·1 answer
  • A solution has [oh−] = 4.0×10−8. what is the value of [h+] for the solution? answers
    12·2 answers
  • Formula of atom bomb​
    11·1 answer
  • What happends to particles in matter when matter gains heat?
    8·2 answers
  • What other aspects of a catalyzed reaction are different from the uncatalyzed reaction?.
    7·1 answer
  • A 90.0 g sample of an unknown metal absorbed 25.6 J of heat as its temperature increased 1.18 degrees C. What is the specific he
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!