2C(s) + 2H2(g) → C2H4(g): ΔH = +52.4 kJ/mol Which statement about this reaction is correct?

Chemistry

1 answer:

artcher [175]3 years ago

6 0

<h3>Answer;</h3>

26.2 kJ of energy are absorbed for every mole of carbon reacted

<h3>Explanation;</h3>

ΔH is the enthalpy change which is given by subtracting the energy of reactants from the energy of products.
That is; ΔH = energy of products - energy of reactants
In this case, it means that C2H4 has more energy than the the reactants. 52.4 J of energy to be precise, this energy is absorbed during the reaction.
However, Two moles of Carbon require that much energy, thus one mole will require only 26.2 to react.

You might be interested in

A 25.0 mL sample of a solution of an unknown compound is titrated with a 0.115 M NaOH solution. The titration curve above was ob

Mnenie [13.5K]

Answer:

Weak acid

Explanation:

A titration curve is a graphical description of the change in pH of the solution in the conical flask as the reagent is added from the burette. A titration curve can be plotted for the different kinds of acid and base titrations. The volume of the titrant is always plotted as the independent variable and the pH of the solution as the dependent variable. The equivalence point is read off from the titration curve. A titration curve is very important because it shows the pH at various points during the titration.

A weak acid/strong base titration leads to an equivalence point above 7. From the question, we were told that the pH at equivalence point lies around 8. Hence the unknown substance must be a weak acid.

3 0

4 years ago

Please help me with chem, it would be very appreciated!

Lelu [443]

To determine the shapes of molecules, we must become acquainted with the Lewis electron dot structure. Although the Lewis theory does not determine the shapes of molecules, it is the first step in predicting shapes of molecules. The Lewis structure helps us identify the bond pairs and the lone pairs.

Please mark BRAINLIEST.

5 0

3 years ago

Which of the following has a polar covalent bond? b. Which of the following has a bond closest to the ionic end of the bond spec

Marizza181 [45]

Explanation:

Polar covalent bonding is the type of the chemical bond in which the pair of the electrons is unequally shared between the two atoms. As a result, the atom with higher value of electronegativity acquires a slightly negative charge and the atom with lower value of electronegativity acquires a slightly positive charge.

In the molecule of $CH_3NH_2$ , the bond which is closest to ionic end of bond spectrum is N-H bond because the nitrogen atom is more electronegative than hydrogen and is ionic in nature.

In the molecule of $CH_3CH_3$ , the bond which is closest to ionic end of bond spectrum is no one because there is not much difference between carbon and hydrogen for the bond to be said as ionic.

In the molecule of $CH_3OH$ , the bond which is closest to ionic end of bond spectrum is O-H bond because the oxygen atom is more electronegative than hydrogen and is ionic in nature.