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svetoff [14.1K]
2 years ago
7

A potential energy diagram is shown. What is the total change in enthalpy of this reaction? 25 kJ 30 kJ 35 kJ 55 kJ

Chemistry
1 answer:
Kazeer [188]2 years ago
5 0

Answer : The total change in enthalpy of this reaction is 25 kJ.

Explanation :

Enthalpy of reaction : It is defined as the changes in heat energy takes place when reactants go to products. It is denotes as .

ΔH = Energy of product - Energy of reactant

ΔH is positive when heat is absorbed and the reaction is endothermic.

ΔH is negative when heat is released and the reaction is exothermic.

In the given potential energy diagram, the energy of product at higher level and energy of reactant at lower level. The ΔH for this reaction will be positive.

Given:

Energy of product = 55 kJ

Energy of reactant = 30 kJ

ΔH = Energy of product - Energy of reactant

ΔH = 55 kJ - 30 kJ

ΔH = 25 kJ

Thus, the total change in enthalpy of this reaction is 25 kJ.

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The answer to your question is 1.37ml.
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2 years ago
A boy swings a rubber ball attached to a string over his head in a horizontal, circular path. The piece of string is 1.15 m long
gregori [183]

Answer:

v = 16.49 m/s

Explanation:

Given that,

Length of the string, l = 1.15 m

The ball makes 137 complete turns each minute.

We know that, 1 turn = 6.28 rad

137 turns = 860.79 rad

1 min = 60 s

\omega=\dfrac{860.79\ rad}{60\ s}\\\\=14.34\ rad/s

We need to find the tangential velocity of the ball. It can be given by

v=r\omega\\\\=1.15\times 14.34\\\\v=16.49\ m/s

So, the tangential velocity of the ball is 16.49 m/s.

5 0
3 years ago
What is the name for this molecule? a skeletal model of an 8-carbon zig zag chain. there is a double bond between the first and
yKpoI14uk [10]

The name of the compound by using the <u>IUPAC nomenclature of organic compounds</u> is 1 -octene. The correct option is the last option - 1-octene.

<h3>Nomenclature of Organic compounds</h3>

From the question, we are to determine the name of the given molecule.

To name the compound, we will follow the IUPAC rules.

Some of IUPAC rules are

  • Find the longest continuous carbon chain. Determine the root name for this parent chain.
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The given compound has 8 carbons and a double bond. The root name of the compound is octane.

By <u>IUPAC rules</u>, the compound is an <u>Octene</u>.

Since the double bond is between carbon-1 and carbon-2. The compound becomes 1-octene.

Hence, the name of the compound by using the <u>IUPAC nomenclature of organic compounds</u> is 1 -octene. The correct option is the last option - 1-octene.

Learn more on Nomenclature of Organic compounds here: brainly.com/question/26754333

The diagram for the compound is attached below.

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ompare your TLC analysis with the results of the column chromatography. More polar molecules move more slowly through silica tha
Assoli18 [71]

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You may find the chemical structures of both molecules in the attached picture.

Column chromatography, which use as stationary phase silica gel, is a good technique for separation of the Methyl Orange from Biphenyl.

Being a non-polar molecule,  Biphenyl will have a higher R value than the Methyl Orange.

To separate them you use a appropriate solvent as eluent, as exemple chloroform, and Biphenyl will elute first from the column and after that, as a separate phase, Methyl Orange will elute thus separating them.

Learn more about:

chromatography

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#learnwithBrainly

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