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user100 [1]
3 years ago
14

Consider the reaction:

Chemistry
1 answer:
Vesna [10]3 years ago
7 0

Answer:

The correct answer is E.

Explanation:

Given the reaction:

C₂H₅OH (l) + 3 O₂(g) ⇒ 2 CO₂ (g) + 3 H₂O (l) ; ΔH = -1.37×10³ kJ

We can see that ΔH is negative. This means that the product formation energy is less than the reagent formation energy. In other words, the reaction releases heat and is therefore an exothermic reaction.

In addition, the enthalpy of formation of liquid water has different value than the enthalpy of formation of gaseous water. Therefore, the enthalpy variation would have a different value if the water formed was in a gaseous state.

Finally, the propositions II and III are true.

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What does the latent heat of vaporization represent?
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<h3>Answer:</h3>

<u>∅</u><u>C</u>. The amount of energy required to turn a mole of a liquid into a gas

<h3>Explaination:</h3>

The amount of energy required to convert a liquid to a gas is called the enthalpy of vaporization

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7 0
1 year ago
Read 2 more answers
Two voltaic cells are to be joined so that one will run the other as an electrolytic cell. In the first cell, one half-cell has
vladimir1956 [14]

Au/Cr cell will run as a voltaic cell and Co/Zn cell will run as an electrolytic cell.

<h3>What is an electrolytic cell?</h3>

An electrolytic cell that uses electrical energy to enable a non-spontaneous redox reaction is known as an electrolytic cell.

Certain chemicals can be electrolyzed using electrolytic cells, which are electrochemical cells.

For example, water can be electrolyzed to create gaseous oxygen and gaseous hydrogen with the use of an electrolytic cell.

The following are the three essential parts of electrolytic cells:

Cathode (which is negatively charged for electrolytic cells)

Anode (which is positively charged for electrolytic cells)

Electrolyte

The reactions for each half cell is given by

Au^{3+}(aq) + 3e^- \rightleftharpoons Au(s) ; E° = 1.50 V

Cr^{3+}(aq) + 3e^- \rightleftharpoons Cr(s) ; E° = –0.74 V

Co^{2+}(aq) + 2e^- \rightleftharpoons Co(s) ; E° = –0.28 V

Zn^{2+}(aq) + 2e^- \rightleftharpoons Zn(s) ; E° = –0.76 V

When the Au/Cr cell will run as a voltaic cell and Co/Zn cell will run as an electrolytic cell, the a difference in the voltages is produced

E^o_{series} = E^o_{Au/Cr} - E^o_{Co/Zn}  = 2.24 V – 0.48 V = 1.76 V

Learn more about electrolytic cell:

brainly.com/question/19854746

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1 year ago
Someone please answer i’ll give you brainly.
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Let's hope she didn't watch it without me or i will never be speaking to her again :))
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What the Purpose of seeds
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Answer:

The purpose of all seed is reproduction and is to grow a new plant, thus propagating the species.

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The reason that elements in the same group all have similar chemical properties is because they all have the same
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D-number of electrons in the outer energy level.
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