1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
xz_007 [3.2K]
4 years ago
5

Calculate difference, ΔH-ΔE=Δ(PV) for the combustion reaction of 1 mole of heptane. (Assume standard state conditions and 298 K

for all reactants and products.) The ideal gas law must be used. The incremental change in volume due to liquids is neglected (cf the volume of 1 mole of H2O(l) is 18 mL, whereas the volume of 1 mol of a gas at 298 K is about 24,450 mL. Be careful to account for the total change in number of moles of gas molecules (be sure the signs and units are correct too). Note that certain alkanes are gases in the standard state.
Chemistry
1 answer:
Mamont248 [21]4 years ago
6 0

Answer:

ΔPV = -9911 J

Explanation:

The combustion of 1 mole of heptane is:

C₇H₁₆(l) + 11O₂(g) → 7CO₂(g) + 8H₂O(l)

The change in number of moles of gas molecules is:

Δn = 7 moles products - 11 moles reactants = -<em>4 moles</em>

Using ideal gas ΔPV is:

ΔPV = ΔnRT

Where:

Δn is -4mol

R is 8,314472 J/molK

T is 298K

Replacing:

<em>ΔPV = -9911 J</em>

<em />

I hope it helps!

You might be interested in
What factor is most responsible for the fact that water is a liquid rather than a gas at room temperature?
ivann1987 [24]
The factor that is most responsible for the fact that water is a liquid rather than gas at room temperature is the hydrogen bonding. The hydrogen bonding keeps the water molecules bonded together, otherwise it would have been in a gaseous state. I hope the answer helps you.
5 0
4 years ago
Read 2 more answers
Please Help thank you
Harlamova29_29 [7]

I suppose because of the fact that the relative humidity is taking away your heat and making you feel cool, I think that you would feel cooler than someone who was dry.

4 0
3 years ago
Justify the statement, "nuclear energy is harmful as well as useful."​
Olenka [21]

Nuclear energy is harmful because it releases of harmful ionizing radiation and has been employed in the production of atomic bombs and hydrogen bombs.

Nuclear energy is beneficial in that it produces vast amount of energy for domestic and industrial purposes.

<h3>What is nuclear energy?</h3>

Nuclear energy refers to the energy which is produced as a result of the changes that occur in the nucleus of atoms of elements.

Nuclear energy produces the largest amount of energy when compared to other forms of energy sources.

Nuclear energy is produced by two types of nuclear reactions:

  • Nuclear fission and Nuclear fusion

Nuclear energy is harmful in that it results in the release of harmful ionizing radiation which damages cells and tissues of living organisms.

Nuclear energy is also harmful because nuclear energy has been employed in the production of atomic bombs and hydrogen bombs.

On the other hand, nuclear energy is beneficial in that it produces vast amount of energy which can be used for domestic and industrial purposes. It also produces fewer wastes that damage the environment compared to fossil fuels.

In conclusion, nuclear energy is both beneficial and harmful.

Learn more about nuclear energy at: brainly.com/question/15214614

#SPJ1

8 0
2 years ago
Which state or states of matter have fixed volume but not a fixed shape? (HELP FAST)
tensa zangetsu [6.8K]

Answer:

liquid

Explanation:

A solid is defined as substance with a set volume and form. A liquid is defined as substance with a set volume but no fixed form. A gas is substance that does not have a definite volume or shape. Plasma, like a gas, has no set volume or shape.

5 0
3 years ago
What is the total number of atoms in a molecule of CH3OH?<br> one<br> three<br> four<br> six
masya89 [10]
Six !

Just count each element in the molecule (Since there are 4 hydrogen atoms, a carbon and an oxygen atom in this molecule of methanol.)
6 0
4 years ago
Read 2 more answers
Other questions:
  • Why is the periodic table such a brilliant piece of work? Explain and give two reasons.​
    10·1 answer
  • I need help idk how to do the predicting product
    5·2 answers
  • What orbital is represented by the transition metals in period four
    15·1 answer
  • How many moles of tungsten are in 1.05 * 10^24 atoms of tungsten?
    9·1 answer
  • What are not chemical properties of matter?!
    5·1 answer
  • WILL GIVE BRANLIEST AND 30 POINTS!! Please help!
    6·1 answer
  • Select the statement that is incorrect. View Available Hint(s) Select the statement that is incorrect.
    14·1 answer
  • What are two characteristics for bases.
    7·1 answer
  • Mmmmmmmmmmmmmtyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy
    7·2 answers
  • Can some please help me complete this for me it’s due today!
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!