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
kenny6666 [7]
3 years ago
9

Ethane, a minority component of natural gas, burns to form carbon dioxide and water according to this reaction: 2H3C−CH3(g)+7O2(

g)→4CO2(g)+6H2O(g) Note that the average bond energy for the breaking of a bond in CO2 is 799 kJ/mol. Use average bond energies to calculate ΔHrxn for this reaction.
Chemistry
1 answer:
IRISSAK [1]3 years ago
4 0

Answer:

The answer is -2812 kJ.

Explanation:

I got this answer from another person:

The following values will vary depending on the source;

C-C  347 kJ/mole;  C-H 414 kJ/mole;  O-H 464 kJ/mole ;  O=O  498 kJ/mole

It takes energy to break bonds and energy is released when bonds are formed.

Ethane has 1 C-C bond  ;  1(347 )  347 kJ/mole

Ethane has 6-C-H bonds;  6(414) = 2484 kJ/mole

Break the bonds of 1 mole of C2H6  =  2831 kJ

2 moles of ethane in balanced equation:  2(2831 kJ) =  5662 kJ

Break 7 O=O bonds  =  7(498 ) = 3486

Total energy to break all bonds: 5662 +   2486 = +9148 kJ

2C=O bond formed in CO2  = 2(799) =  1598 kJ/mole

4 moles of CO2 = 4(1598) =  6392

2(O-H) bonds in H2O =  2(464)  =  928 kJ/mole

6 moles of H2O  =  6(928 kJ) = 5568

Total energy released =  6392 + 5568 = 11,960 kJ  

The sign of this energy is -11,960 since it is exothermic.

Energy change for 2 moles of ethane = -11,960 + 9148 = -2812 kJ

ΔHrxn = -2812 kJ

You might be interested in
Unknown # 41
Semmy [17]
Answer: Potassium Iodide, KI

Explanation:

Flame test colors:

Li+ = Crimson Red
Na+ = Bright Orange-Yellow
K+ = Lilac

Addition of nitric acid and silver nitrate (HNO3 and AgNO3),

Cl- = White precipitate
Br- = Creamy precipitate
I- = Yellow Precipitate

Hope this helps, brainliest would be appreciated :)
3 0
3 years ago
What happens ????????
ivolga24 [154]
Correct me if I wrong but I think it's "c"
5 0
3 years ago
Read 2 more answers
Show me step by step solution
Cloud [144]
Ok I may be young but combine the two reactions to create a compund
7 0
3 years ago
Observation and assessment are most effective when
Artist 52 [7]
I think the answer is A. Hope that helped :)
6 0
3 years ago
Copper sulfate can crystalize as an anhydrate (no water in the crystal) or as three different hydrates (varying amounts of water
Maurinko [17]

Answer:

Two factors that might have a affect of which copper sulphate mineral will occur at a given location  is:

A. Copper sulphate high solubility in water

B. Also it binds nicely with the sediments  or the crystal.

Explanation:

As it is mentioned here that copper sulphate can be crystallized as an anhydrate which means that their  is no waterin those crystals or can be as of those three different hydrates whose crystal structure varies with the amount of water present in it.

The four forms are also given of the copper sulphate are:

  • Bonatite
  • Boothite
  • Chalcanthite
  • Chalcocyanite

So, the two factors that might give an affect which type of copper sulphate  mineral willoccur at a given location is:

A. The copper sulphate high solubility in water.

B. It binds extremely nicely with the sediments or say to the crystal. It is  also regulated by plants.

8 0
3 years ago
Other questions:
  • Which activity most likely involves the direct use of saturated hydrocarbons?
    13·2 answers
  • Explain the relationship between high and low <br> pressure.
    9·1 answer
  • Living organisms all have dna and rna which are both
    9·2 answers
  • What happens to the influenza virus every 20-40 years, and why? What are the recent example(s)?
    8·1 answer
  • Convert 80 ml to kl.
    5·1 answer
  • Which of the following statements is not true?
    8·1 answer
  • The answer is what I need to know thank you
    11·1 answer
  • A 38.4−g sample of ethylene glycol, a car radiator coolant, loses 852 J of heat. What was the initial temperature of the ethylen
    12·1 answer
  • how much power is needed to move a box a distance of 2 meters in 4 seconds when you push with 1,492 newton’s
    14·1 answer
  • Net ionic equation of HF(aq)+RbOH(aq)=H2O(l)+RbF(aq)
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!