What causes thermal energy to be released
1 answer:
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Explanation:
The molecular weight of benzoyl peroxide is 242.23 g/mol.
Therefore, number of moles present in 200 g of benzoyl peroxide are as follows.
No. of moles =
=
= 0.825 mol
Molecular weight of PTFE is 100 g/mol.Hence, calculate the number of moles of PTFE in 38 kg as follows.
As 1 kg = 1000 g. So, 38 kg = 38000 g.
No. of moles =
=
= 380 mol
As it is given that the initiator is 15% active. So, actual number of moles of benzoyl peroxide are as follows.
= 0.124 mol
For combination, 1 mol of benzoyl peroxide produces 1 chain. Therefore, degree of polymerization will be calculated as follows.
DP =
= 3065.33 mol
Average molecular weight of monomer is as follows.
= 100.05 g/mol
Therefore, calculate the expected molecular weight of polymer as follows.
= 306675.23 g/mol
Hence, for disproportion 1 mole benzoyl peroxide produces 2 chains.
DP =
= 6129.03
Therefore, calculate the expected polymer weight as follows.
= 613209.68 g/mol
Thus, we can conclude that the the expected polymer weight is 613209.68 g/mol.
Answer:
Option c: Possible electron energy states are quantized within an atom.
Explanation:
The Bohr's Model of the hydrogen atom consisted of the movements of the electrons around the positively-charged nucleus in circular orbits that have a certain energy state. The energy of that orbit is given by:
<em>Where:</em>
E(n): is the energy of an electron in a particular orbit
R: is the Rydberg constant
h: is the Plank constant
c: is the speed of light
n: is a positive integer which corresponds to the number of the orbit
The ground state energy of a electron in the hydrogen atom is equal to -13,6 eV.
Bohr's Model aims to propose that the electron is restrictedly to occupy a certain region in the atom.
Therefore, the conclusion of Bohr after observing emission spectrum lines is that "possible electron energy states are quantized within an atom", so the correct option is c.
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