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3 years ago

What is the internal energy of a system? What is the variable for internal energy?

Chemistry

1 answer:

Orlov [11]3 years ago

7 0

Explanation:

Internal energy is the sum of all the energies inside or within a system because molecules of the system will have kinetic, potential, rotational, vibrational etc energies.

Internal energy arises because of random or disordered movement of particles within a system.

Therefore, internal energy of a system is the sum of kinetic and potential energy of all the particles present inside the system.

The variable for internal energy is "U". Also, change in internal energy is represented by $\Delta U$ .

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The distances from large bodies of water will affect the average rainfall of an area. (Example: Florida has more rain than Nevad

lions [1.4K]

Answer:

Explanation:

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2 years ago

Question 9 Multiple Choice Worth 4 points)

Rufina [12.5K]

Answer:

Explanation:

Would you base your career options using science?

Would you base your moral behavior on science? Science is notorious for not being able to answer moral questions.

Would you base the "meaning of life" on science? The meaning of life is hardly a question that the periodic table could answer.

The only option left is plant growth which science could answer.

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3 years ago

Read 2 more answers

If 45.0 mL of ethanol (density =0.789g/mol) initially at 6.0°C mix with 45.0 mL of water (density =1.0 g/mol) initially at 28.0°

Likurg_2 [28]

The final temperature of the mixture : 21.1° C

<h3>Further explanation </h3>

The law of conservation of energy can be applied to heat changes, i.e. the heat received / absorbed is the same as the heat released

Q in(gained) = Q out(lost)

Heat can be calculated using the formula:

Q = mc∆T

Q = heat, J

m = mass, g

c = specific heat, joules / g ° C

∆T = temperature difference, ° C / K

Q ethanol=Q water

mass ethanol=

$\tt mass=\rho\times V\\\\mass=0.789\times 45=35.505~g$

mass water =

$\tt mass=1~g/ml\times 45~ml=45~g$

then the heat transfer :

$\tt 35.505\times 2.42~J/g^oC\times (t-6)=45\times 4.18~J/g^oC\times (28-t)\\\\85.922t-515.533=5266.8-188.1t\\\\274.022t=5782.33\rightarrow t=21.1^oC$

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2 years ago

Your favorite beach has 42 large sand dunes throughout the course of the year wind erosion destroys eight sand dunes and create

a_sh-v [17]

42- 8 = 34 sand dunes must be the answer

hope so it helps

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3 years ago

Addie mixes together a solution of 10 grams of

Gnesinka [82]

Answer: 150 grams

Explanation: m = V × ρ

= 15 milliliter × 10 gram/cubic centimeter

= 15 cubic centimeter × 10 gram/cubic centimeter

= 150 gram

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3 years ago