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algol [13]
4 years ago
8

Which statement defines the temperature of a sample of matter?

Chemistry
1 answer:
stepan [7]4 years ago
7 0
Temperature is a measure of the average kinetic energy of the particles in the sample. This is the statement that defines the temperature of a sample of matter.

The temperature of a system is defined simply as the average energy of microscopic motions of a single particle in the system per degree of freedom.

The microscopic motions in a solid matter is the principal vibrations of the constituent atoms about their sites. In an ideal monoatomic gas, the microscopic motions are the translational motions of the constituent gas particles. In multiatomic gases, aside from translational motions, vibrational and rotational motions are included in the microscopic motions.


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The line in the faster rotating star is broader.

Explanation:

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How many moles are in 23 g of LICI
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42.394

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3 years ago
Predict the sign of ΔS for each process:(c) Cl₂(g) (100°C and 1 atm) → Cl₂(g) (10°C and 1 atm)
dexar [7]

The entropy for the process:

Cu(s) (350°C and 2.5 atm) → Cu(s) (450°C and 2.5 atm) decreases. The sign of entropy is negative.

<h3>What is Entropy? </h3>

Entropy is defined as the measure of the thermal energy of a system per unit temperature which is unavailable for doing useful work. As the work is obtained from ordered molecular motion, therefore the amount of entropy is also gives a measure of the molecular disorder, or randomness, of a system.

<h3>Effect of Temperature</h3>

There is increase in the Entropy as temperature increases. An increase in the temperature results that particles of substance have greater kinetic energy. The fast moving particles have more disorder than particles which are moving slowly at the given lower temperature.

<h3>Effect of Pressure</h3>

The entropy increases with increases in the pressure on the substance.

Since the temperature of given reaction decreases. So, entropy also decreases.

Thus, we concluded that the entropy for the process:

Cu(s) (350°C and 2.5 atm) → Cu(s) (450°C and 2.5 atm) decreases. So, the sign of entropy is negative.

learn more about Entropy:

brainly.com/question/14131507

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7 0
2 years ago
You are preparing some solutions for your instructor and have been asked to prepare 3.00 L of a 0.250M sodium hydroxide solution
grigory [225]

Answer:

C. 30.0 g NaOH and add water until the final solution has a volume of 3.00 L.

Explanation:

Molarity of a substance , is the number of moles present in a liter of solution .

M = n / V

M = molarity

V = volume of solution in liter ,

n = moles of solute ,

from the question ,

M =  0.250M

V  = 3.00 L

M = n / V

n = M * v

n = 0.250M * 3.00 L = 0.75 mol

Moles is denoted by given mass divided by the molecular mass ,

Hence ,

n = w / m

n = moles ,

w = given mass ,

m = molecular mass .

From the question ,

n = 0.75 mol NaOH

m = molecular mass of NaOH = 40 g/mol

n = w / m

w = n * m

w = 0.75 mol * 40 g/mol = 30.0 g

Hence , by using 30.0 g of NaOH and dissolving it to make up the volume to 3 L , a solution of 0.250 M can be prepared .

4 0
3 years ago
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