Which of the following describes the mechanical efficiency of a machine?

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:

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6 0

2 years ago

To what extent were the goals of reconstruction regarding african-americans achieved by 1900?.

Gemiola [76]

Answer: The goals were

ensure citizenship and civil liberties , Provide economic , and Provide education opportunities for former slaves

Explanation:civil right act in 1866

7 0

3 years ago

I need help with this problem plz do not cheap out on this and i swear to god if u do it just for the points *&^&*%$#%^&

erastova [34]

Answer:

I think maybe C or D

Explanation:

7 0

4 years ago

Read 2 more answers

In this stanza, prufrock repeats "do i dare?" three times. What does the repetition indicate about his state of mind? he is inde

ASHA 777 [7]

The repetition of the phrase "do i dare?" three times indicates that: he is indecisive.

One of the central themes that were explored in "The Love Song of J. Alfred Prufrock" is the social anxiety that he experiences.

He is worried about people's conception of him and that is why before he descends the stairs, he wonders if he can dare face the people because of the bald spot in the middle of his head and several other insecurities.

So, option A is correct.

Learn more about The Love Song of J. Alfred Prufrock here:

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8 0

3 years ago

The speaker’s series of exclamations in lines 31-33 (""sweet. . . Pan"") interrupt the pace of the narrative in order to.

notka56 [123]

The reason for the speakers interruption of the narrative was to; dramatize the overwhelming beauty that is revealed as Pan begins to play

<h3>What is the aim of the speaker?</h3>

This question is taken from a poem that shows a dramatic retelling of a mythological story that resonates with the speaker's experience.

In the poem, we see the speaker in line 21 talk about the reed's pith as being "like the heart of a man" to show the pan's casual cruelty.

However, in lines 31 to 33, the interruption of the pace of the narrative was in order to dramatize the overwhelming beauty that is revealed as Pan begins to play.

Read more about aim of speaker at; brainly.com/question/17543484

3 0

2 years ago