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fenix001 [56]
3 years ago
10

Which of the following would have the lowest entropy?

Chemistry
2 answers:
SpyIntel [72]3 years ago
8 0
A) diamond

Because solids has the lowest microstates
sweet [91]3 years ago
5 0

Answer:

A. Diamond

Explanation:

Entropy is an important physical quantity used in statistical mechanics and thermodynamics to measure the degree of disorder of a system. We say that the greater the entropy variation of a system, the greater its clutter, the less energy will be available for use.  Entropy is related to the spontaneity of some physical or chemical process. Whenever such a process happens spontaneously, the entropy of the system will increase, ie the system will be less organized or more random.

If we compare three systems with entropy: the first with something in the liquid state, the second with something in the solid state, and the third with something in the form of vapor, we will conclude that the entropy of the third system will be greater than the others, due to the greater agitation of the molecules. Already the second system, with something in the solid state will be the system with less entropy because in this case the spacing between the molecules of this "something" is smaller and consequently the agitation of them. For this reason, as diamond is something in solid state, we can say that with the exposed options, diamond is the alternative with less entropy.

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Answer:

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Explanation:

It is possible to find pH of a buffer by using H-H equation, thus:

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<em>Where [HA] is concentration of the weak acid TRIS-HCl and [A⁻] is concentration of its conjugate acid.</em>

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10.0g of TRIS-HCl (Molar mass: 121.135g/mol) are:

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Replacing (1) in (2):

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The moles of A⁻ comes from the reaction of the weak acid with NaOH, that is:

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Thus, <em>you need to add 0.02082 moles of NaOH to produce 0.02082 moles of A⁻. </em>As NaOH solution is 0.500M:

0.02082 moles NaOH ₓ (1L / 0.500mol) = 0.04164L of NaOH 0.500M =

<h3>41.64mL of NaOH 0.500M must be added to obtain the desire pH</h3>

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