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mart [117]
3 years ago
13

Which of the following best defines the internal energy of a system?

Chemistry
1 answer:
Anarel [89]3 years ago
7 0
 <span>In thermodynamics, the internal energy of a thermodynamic system, or a body with well-defined boundaries, denoted by U, or sometimes E, is the total of the kinetic energy due to the motion of molecules (translational, rotational, vibrational) and the potential energy associated with the vibrational and electric energy of atoms within molecules or crystals. It includes the energy in all the chemical bonds, and the energy of the free, conduction electrons in metals.</span>
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Answer:

B. CA, 14

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For the compound XCl_{2}, it can be broken down into X^{2+} and 2Cl^{-}. Its ion has a mass of 34 and 18 electrons which means it has already lost 2 electrons.

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For the given element, the number of electrons is 18+2 = 20 electrons.

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And the number of neutrons is 14.

Only option B has the correct answer.

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Answer:

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