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3 years ago

Trình bày các chỉ tiêu tính chất vật lý của đất

SAT

1 answer:

harina [27]3 years ago

7 0

Trình bày các chỉ tiêu tính chất vật lý của đất

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Scientists generally agree that Earth is getting warmer due to what's called the greenhouse effect. (2) A greenhouse stays warm

vova2212 [387]

The topic sentence is the first sentence. It defines what the rest of the paragraph will be. <span />

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4 years ago

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Find δs o for the combustion of methane to carbon dioxide and liquid water.

mote1985 [20]

The entropy change ΔS for the combustion of methane to carbon dioxide and liquid water is -242.6 J/mol.K

<h3>What is the Entropy in a Chemical system?</h3>

In a chemical system, Entropy (ΔS) is a quantitative measure of the variety of possible ways to disperse energy inside a chemical system.

In an isothermal process, entropy is determined as the quantity of heat transmitted to a system.

The chemical reaction for the combustion of methane can be expressed as:

$\mathbf{CH_{4(g)} + 2O_{2(g)} \to CO_{2(g)} + 2H_2O_{(l)}}$

The standard entropy of the combustion is expressed as:

$\mathbf{\Delta S^0 =(S^0 _{CO_{2}} + 2 \times S^0 _{H_{2}O} )+(-S^0 _{CH_{4}} -2 \times S^0 _{O_{2}} })$

Replacing the standard entropies of the compounds into the above equation, we have:

$\mathbf{\Delta S^0 =(213.8 \8 \ J/mol.K + 2 \times69.92 \ J/mol.K )+(-186.16 \ J/mol.K -2 \times 205.04 \ J/mol.K})$

$\mathbf{\Delta S^0 =-242.6 \ J/mol.K}$

Learn more about entropy here:

brainly.com/question/6364271

6 0

2 years ago

gtnhenbr [62]

Answer:

^^^^^^^^^^^^^^^^^^^

Explanation:

7 0

3 years ago

Which of the following is an example of chemical control of nonnative species? a. mowing b. herbicides c. net barriers d. inspec

hram777 [196]

Answer:

B. Herbicides

Explanation:

Nonnative species are species that are found outside their natural habitat. They are also called foreign species. They are introduced through the activities of man either deliberately or in-deliberately . They can be controlled by chemical, biological and mechanical means.

Mowing, net barriers and inspections are mechanical controls.

Biological control is the deliberate introduction of natural enemies of these nonnative/foreign species.

The use of herbicides is a chemical control of plants that grow where they are not wanted.

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3 years ago

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What areas of his classmates life may be impacted by cyberbullying? A. Physical health B. Recent memories C. School performance

Varvara68 [4.7K]

The answer is D. Emotional Health.

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4 years ago

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