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
VladimirAG [237]
2 years ago
9

How much heat energy is obtained when 1 kg of ethane gas, C2H6, is burned in oxygen according to the equation: 2C2H6(g)+7O2(g)→4

CO2(g)+6H2O(l)ΔHm=–3120 kJ(3.8.3)
Chemistry
1 answer:
Xelga [282]2 years ago
5 0

Answer:

52,000 kJ

Explanation:

The combustion reaction is the following:

2 C₂H₆(g) + 7 O₂(g) → 4CO₂(g) + 6H₂O(l)  ΔHm= –3120 kJ

From the chemical reaction and the value of ΔH we can see that 2 moles of ethane gas (C₂H₆(g)) release 3120 kJ of heat energy. So, we have the conversion factor: 3120 kJ/2 moles C₂H₆.

To calculate how many kJ are released from the combustion of 1 kg of ethane, we have to first convert the mass to moles by using the molecular weight (MW) of ethane (C₂H₆):

MW(C₂H₆) = (12 g/mol x 2 C) + (1 g/mol x 6 H) = 30 g/mol

mass = 1 kg x 1000 g/1 kg = 1000 g

moles of C₂H₆= mass/MW = 1000 g/(30 g/mol) = 33.3 mol C₂H₆

Finally, we multiply the conversion factor by the number of moles of C₂H₆ in 1 kg:

heat energy released = 33.3 mol C₂H₆ x 3120 kJ/2 moles C₂H₆ = 52,000 kJ

Therefore, 51,000 kJ are released when 1 kg of ethane is burned.

You might be interested in
The H+ ion concentration of a solution is 1 x 10 ^ -5 M. This solution is...
pav-90 [236]

Answer:

To know this

get the pH

pH= -log(H+)

pH= -log(1x10^-5)

pH= 5.

It is Acidic.

Acidic ranges from 1 - 7

It falls within this range

3 0
3 years ago
#12 please! worth 40 points
Serga [27]
Okay so because of the difference in density a simple method for telling the difference between the two is to put a sample in a container with oil, because water has a higher density than the oil it would sink to the bottom but alcohol on the other hand is lighter than oil and would float on top of the oil.

However with this question I think that what you would do is use the ice to find out what the substance is, it would float on top of the liquid if it were water because the water is denser than ice but the ice would sink if it was alcohol because the alcohol is less dense than ice. 


I hope this helps you, good luck : )

3 0
3 years ago
The molar mass of sucrose (C12H22O11) is 342.3 g/mol. A chemist has a 0.500-mol sample of sucrose. What is the mass, in grams, o
Gekata [30.6K]
171 is the answer that I got after my calculations.
8 0
3 years ago
Read 2 more answers
What is the balanced form of the chemical equation shown below?
oksian1 [2.3K]

Answer:

c

Explanation:

it is the right answer

4 0
3 years ago
For each relationship, write 2 conversion factors:
Burka [1]
C. 

jk dont do it hehehehe















6 0
3 years ago
Other questions:
  • Will Florine react? will it combine with other elements?
    14·1 answer
  • Please, can i get some help with these question? Can anyone please answer what exactly i should write?
    5·2 answers
  • En las siguientes reacciones identifique cuales sustancias corresponden a ácidos y bases de Arrhenius y cuales a ácidos y bases
    11·1 answer
  • Epsom salts is a hydrated ionic compound with the following formula: MgSO4⋅x H2O. A 4.93-g sample of Epsom salts is heated to dr
    8·1 answer
  • Why does earth have uranium
    8·2 answers
  • Why can't liquids change volume but gases can
    6·1 answer
  • Anyone know who Selena Quinten is??????????
    14·2 answers
  • Calculate ΔGrxn for this equation, rounding your answer to the nearest whole number.
    13·2 answers
  • All of the energy comes from the sun but ______ capture this energy?​
    15·1 answer
  • How much would a 10 kg suitcase weigh on the surface of…? a. The Moon b. Mars c. Saturn d. Pluto
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!