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3 years ago

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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A volume of 100 mL of 1.00 M HCl solution is titrated with 1.00 M NaOH solution. You added the following quantities of 1.00 M Na

s344n2d4d5 [400]

Answer:

a: before equivalence point

b: equivalence point

c: before equivalence point

d: after the eqivalence point

e: before equivalence point

f: after the eqivalence point

Explanation:

Balanced equation of reaction:

NaOH +HCl =NaCl +H2O;

Volume of HCl is fixed and it 100ml and concentration is 1.0M

N1 and N2 normality of HCl and NaOH respectively;

V1 and V2 volume of HCl and NaOH respectively;

we have given molarity but we need normality;

$Normality=molarity \times n-factor$

but in case of NaOH and HCl n-factor is 1 for each.

hence

normality=molarity;

At equivalence point: $N_1V_1=N_2V_2$

Before equivalence point : $N_1V_1>N_2V_2$

After the equivalence point: $N_1V_1$

$N_1V_1=100\times1=100$

case a: 5.00 mL of 1.00 M NaOH

$N_2V_2=5\times1=5$

$N_1V_1>N_2V_2$ hence it is before equivalence point

case b: 100mL of 1.00 M NaOH

$N_2V_2=100\times1=100$

$N_1V_1=N_2V_2$ hence it is equivalence point

case c: 10.0 mL of 1.00 M NaOH

$N_2V_2=10\times1=10$

$N_1V_1>N_2V_2$ hence it is before equivalence point

case d: 150 mL of 1.00 M NaOH

$N_2V_2=150\times1=150$

$N_1V_1$ hence it is after the eqivalence point

case e: 50.0 mL of 1.00 M NaOH

$N_2V_2=50\times1=50$

$N_1V_1>N_2V_2$ hence it is before equivalence point

case f: 200 mL of 1.00 M NaOH

$N_2V_2=200\times1=200$

$N_1V_1$ hence it is after the eqivalence point

7 0

3 years ago

What is the trend in electronegativity for elements on the periodic table? It decreases across a period and increases down a gro

lilavasa [31]

It increases across a period and decreases down a group. A good way to remember this is that fluorine is the most electronegative atom, and it's to the top right of the table.

6 0

3 years ago

Read 2 more answers

____is not a resource that can be used to help meet our energy needs

Bezzdna [24]

I believe the answer to this is A.

7 0

3 years ago

Which of the following is not a statement of Dalton's atomic theory of matter?a. Elements are made of atomsb. Atoms of a given e

Alona [7]

Answer:

c. The atoms of one element can be identical to the atoms of another element.

Explanation:

Which of the following is not a statement of Dalton's atomic theory of matter?

a. Elements are made of atoms. TRUE. An atom is the smallest particle of a chemical element that can exist.

b. Atoms of a given element are identical. TRUE. The only slight difference is in the mass of isotopes.

c. The atoms of one element can be identical to the atoms of another element. FALSE. The atoms of different elements are different from one to another.

d. A given compound always has the same number and kinds of atoms. TRUE. This is known as Dalton's law of constant composition.

3 0

3 years ago

I want to know which ones are molecular equation, complete ionic equation and net ionic equation

NNADVOKAT [17]

Answer:

The molecular equations are:

1. CuSO₄ (aq) + 2 KOH (aq) ----> Cu(OH)₂ (s) + K₂SO₄ (aq)

2. Ba(NO₃)₂ (aq) + K₂SO₄ (aq) + BaSO₄ (s) + 2 KNO₃ (aq)

The complete ionic equations are:

1. Ag + (aq) + NO₃- (aq) + I- (aq) + Na (aq) ---> AgI (s) + No₃- (aq) + Na+ (aq)

2. Cu²+ + SO₄²- (aq) + 2 K+ (aq) + 2 OH- (aq) ---> Cu(OH)₂ (s) + 2K+ (aq) + SO₄²- (aq)

The net ionic equations are:

1. Ca²+ (aq) + SO₄²- (aq) ---> CaSO₄ (s)

2. Ba²+ (aq) +SO₄²- (aq) ---> BaSO₄ (s)

Explanation:

A molecular equation is a balanced chemical equation which shows the reacting species as molecules rather than as componenet ions in their compounds with subscripts written beside the molecules to indicate the state in which they occur in the chemical reaction.

An ionic equation expresses the reacting species as components ions in a chemical reation. All the ions and molecules reacting are shown.

In a net ionic equation, the ions which remain in the ionic state also known as spectator ions are not written as part of the equation.

From the given attachment;

The molecular equations are:

1. CuSO₄ (aq) + 2 KOH (aq) ----> Cu(OH)₂ (s) + K₂SO₄ (aq)

2. Ba(NO₃)₂ (aq) + K₂SO₄ (aq) + BaSO₄ (s) + 2 KNO₃ (aq)

The complete ionic equations are:

1. Ag + (aq) + NO₃- (aq) + I- (aq) + Na (aq) ---> AgI (s) + No₃- (aq) + Na+ (aq)

2. Cu²+ + SO₄²- (aq) + 2 K+ (aq) + 2 OH- (aq) ---> Cu(OH)₂ (s) + 2K+ (aq) + SO₄²- (aq)

The net ionic equations are:

1. Ca²+ (aq) + SO₄²- (aq) ---> CaSO₄ (s)

2. Ba²+ (aq) +SO₄²- (aq) ---> BaSO₄ (s)

8 0

2 years ago