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xeze [42]
3 years ago
13

Which best explains what happens when an electron moves from an excited state to the ground state? The electron absorbs energy a

s it moves to a lower energy level. The electron absorbs energy as it moves to a higher energy level. The electron releases energy as it moves to a higher energy level. The electron releases energy as it moves to a lower energy level.
Chemistry
2 answers:
Aneli [31]3 years ago
7 0
I believe the correct answer would be the last option. When an electrons moves from an excited state to the ground state, it would release energy. An electron in the excited state would mean that it contains high kinetic energy so to move to a lower state some of these energy should be released.
liubo4ka [24]3 years ago
5 0
<h3><u>Answer;</u></h3>

The electron releases energy as it moves to a lower energy level.

<h3><u>Explanation;</u></h3>
  • <u><em>Electrons are sub-atomic particles that occupy energy levels in an atom of any chemical element.</em></u> These electrons may move from one energy level to another.
  • <em><u>Electrons may move from a lower energy level or ground state to an excited state or hing energy level, or else move from a higher energy level to a lower energy level.</u></em>
  • When electron moves from a lower energy level lo a higher energy level energy is absorbed by the atom, and when the movement is from higher energy level to lower energy is released mainly as light.
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An iron block of mass 18 kg is heated from 285 K to 318 K. If 267.3 kJ is required, what is the specific heat of iron? A. 450.00
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Answer:

  • <u>Option A. 450.00</u>

Explanation:

<u>1) Data:</u>

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e) S = ?

<u>2) Principles and equations</u>

The specific heat of a substance is the amount of heat energy absorbed to increase the temperature of certain amount (gram, kg, or moles, depending on the definition or units) of the substance in 1 ° C or 1 K.

The mathematical relation between the specific heat and the heat energy absorbed is:

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<u>3) Solution:</u>

<u>a) Substitute the data into the equation:</u>

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<u>b) Solve for S and compute:</u>

  • S = 267.3 kJ / (18 kg × 33 K) = 0.45 kJ / (Kg . K)

The options have not units, but I notice that the first answer is 1,000 times the answer I obtained, so I will make a conversion of units.

<u>c) Convert to J /( kg . k):</u>

  • 0.45 kJ / (Kg . K) × 1,000 J / kJ = 450 J / (kg . K)

Now we can see that the option A is is the answer, assuming the units.

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