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4 years ago

How many moles of air are necessary for the combustion of 5.00 molmol of isooctane, assuming that air is 21.0% O2O2 by volume?

Chemistry

1 answer:

Annette [7]4 years ago

8 0

Answer:

67.5 moles of O2

Explanation:

2 C 8 H 18 + 27 O 2 → 16 C O 2 + 18 H 2 O

According to the balanced chemical equation, in normal air % moles of iso-octane will require 67.5 moles of oxygen to combust completely...

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Consider the following reaction at constant P. Use the information here to determine the value of Î”Ssurr at 355 K. Predict whet

Sloan [31]

The given reaction is as follows:

2NO (g) + O₂ (g) = 2NO₂ (g), ΔH = -114 kJ

It is known that dSsurr = -dHsys / T (Temp = 355 K)

So, dSsurr = - (-114 × 1000) / 355

dSsurr = +321.12 J/K

Hence, the value of dSsurr is +321.12 J/K

For a reaction to be spontaneous, dG<0,

Also dStotal = dSsys + dSsurr > 0

It is known that dG = dHsys - TdSsys,

Now let us assume,

dG<0

Also, dStotal = dSsys + dSsurr > 0

(-114 × 1000) - (355 × dSsys) <0

355 × dSsys > -114 × 1000

dSsys > -321

dSsys >dSsurr

dSsys + dSsurr > 0

dStotal > 0

Thus, the assumption is correct, and the given reaction is spontaneous. Hence, the final answer is Ssurr = +321 J/K reaction is spontaneous.

8 0

3 years ago

PLS HELP THESE ARE RHE ONLY QUESTIONS I HAVE LEFT DUE SOON

tia_tia [17]

Explanation:

Magnesium reacts with dilute hydrochloric acid in a conical flask which is connected to an inverted measuring cylinder in a trough of water. The volume of hydrogen gas produced is measured over a few minutes, and the results are used to plot a graph

This is intended as a class practical. It is best if the students work in pairs because setting up and starting the experiment requires more than one pair of hands. One student can add the magnesium ribbon to the acid and stopper the flask, while the other starts the stopclock. During the experiment, one student can take the readings while the other records them. The experiment itself takes only a few minutes. But allow at least 30 minutes to give students time to set up, take readings and draw graph.

please mark as brainliest

8 0

3 years ago

Please solve this problem

klemol [59]

Explanation:

ans b hcl and ccl4

both these compounds are formed by sharing of electrons......

3 0

4 years ago

55.99 mols of nickel carbonyl produces how many grams of nickels?

Alinara [238K]

Answer:

3286 grams

Explanation:

For every mol of Ni(CO)4 reactant, a mol of Ni is produced (55.99 mol). Multiply this by the molecular mass of Ni (58.69 g/mol) to give 3286 grams

5 0

2 years ago

Read 2 more answers

What is the equilibrium expression for the reaction below?

Mariana [72]

Answer:

A. $K=\frac{[N_2O]^2}{[N_2]^2[O_2]}$

Explanation:

Hello there!

In this case, for us to figure out the appropriate equilibrium expression, it will be firstly necessary for us to recall the law of conservation of mass which states that the equilibrium constant of an equilibrium chemical reaction is written by dividing the products and reactants and including the stoichiometric coefficients as exponents. In such a way, for the given reaction, we will have:

$K=\frac{[N_2O]^2}{[N_2]^2[O_2]}$

As N2O is the product whereas N2 and O2 are reactants; thus, the equilibrium expression will be A.

Regards!

6 0

3 years ago