WEBVTT
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in question. A. We have to find the
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energy required to raise an electron in a hydrogen atom
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from the ground state to the second energy level.
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I'm gonna call this energy required to raise the electron
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, Delta E and from conservation of energy. We
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know that this energy is equal to the energy of
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the final energy level. So that's e to mine
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is the energy of the ground state you want.
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Now the energy of the ground state is minus 13.6
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electoral votes. In the energy of the second under
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your level is equal to minus 13.6, divided by
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two square. That's four converts. Okay, because
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the energy of the end energy level of the hydrogen
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atom his minus is the actual. It's the energy
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of a ground states divided by in squared. So
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this is minus 3.4 electoral votes. So that day
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is minus 3.4 plus 13.6, and this is 10.2
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electoral votes. This is the energy required in question
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be We have to assume that an electron gains this
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amount of energy that we calculated in question a delta
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ah, due to a collision of collisions of the
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hydrogen atom. Actually, collisions have different hydrogen atoms
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in ah, certain gas. Okay. And we
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have to calculate what is the minimum temperature T of
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the gas. Ah, in the situation. Okay
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. And what the exercise asks us to remember is
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that the thermal energy off a gas so e t
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is given by three have off k b. See
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, uh, so the kinetic energy of the guess
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is three houses K B t. And this is
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eat greater or equal than the energy that was gained
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by the elections. Don't tell you. Okay,
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So have a three halves of K B t is
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greater or equal than delta. So have a tea
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is greater or equal than Delta E, actually,
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2/3 of Delta u K B. So this is
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2/3 of Delta is 10 points to electoral votes and
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K B boats. One constant is 8.6 17.
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10% of the minus five electoral votes Calvin to the
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minus one. So T is greater or equal,
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then 7.89 times 10 to the fourth Calvin. So
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the minimum temperature team in is able to 7.89.
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Time sent the fourth, Cowlings