Chemical Formula of Candle Wax and CO2 Releases

[Christophe]

I am trying to determine the CO2 emissions of an "average" candle.

After some research I found that the current candles were composed of solid paraffin (petroleum) and stearin (extract of animal and vegetable fat) as an additive (hardening).

The formula for stearin would be as follows: C18H36O2 on the other hand I can find neither the precise% of stearin, nor the precise formula of paraffin.

Octodecane (a molecule with a straight chain with 18 carbon atoms, the main constituent of solid paraffin at ordinary temperature) is soluble in heptane, liquid at ordinary temperature.

So a priori the paraffin would be mainly C18H38 ...

[delnoram]

The formula for stearin would be as follows: C18H36O2

It's great, I found

Stearin, the basic constituent of candles, is an organic chemical species with the raw formula C57 H 110 O6.

and paraffin nothing

[Christophe]

Also seemed to me to have seen this formula during my "research" ... on the other hand at a coefficient of "3 near" it is almost the same molecule ... I mean by the: the calculation of CO2 emissions with these 2 formulas will be almost identical for the same mass of stearin consumed ...

[Woodcutter]

The problem is that "paraffin" is a generic name for Alkanes ...

A C20 alkane is apparently also found in "paraffin".

Interesting site on HYDROCARBONS ...

[Christophe]

The problem is that "paraffin" is a generic name for Alkanes ...

+1 and I did not really understand pkoi ...

A C20 alkane is apparently also found in "paraffin".

Interesting site on HYDROCARBONS ...

Interesting site
Indeed there is: eicosane, C20H42

Pb: is it solid or liquid paraffin? A priori solid:

up to 16 C are liquids.
Above they are more viscous like tar than frankly solid, but everyone has seen a block of paraffin, and their melting point remains below 120 ° C.

It's crazy how difficult it is to get the chemical formula of a simple candle ...

[Christophe]

Too good the exercise on the Bucheron site looks like Jancovici:

Exercise A doctor of 80Kg takes his car of 1800 Kg consuming 14dm3 per 100 Km, of hydrocarbons with density 0 Kg per dm72 to go and buy a baguette of 3 Kg. At a baker distant 0Km from his home.
1 ° What is the mass of fuel consumed.
2 ° What chemical energy released by the oxidation of this fuel
3 ° What is the energy required to move the vehicle (round trip) considering that the average force is equal to 1/10 of the weight
4 ° How much energy is needed to move the doctor? (A and R) same force = p / 10
5 ° How much energy is needed to move the wand? (return only) same force = p / 10
6 ° Taking into account the chemical energy contained in the fuel consumed, what are the respective yields of 3 °, 4 ° and 5 °?
The doctor could have walked to get his wand, which would have taken him 1 hour 30 minutes, without consuming fuel, but the use of the automobile reduced the duration of the operation to 10 minutes. He will therefore be able to receive during the 1:20 difference, 4 patients for 20 minutes each. The consultation brings him 20 euros, the liter of fuel is charged 1 euro. From what fuel price the use of the car is no longer profitable, assuming that all other prices, including that of the consultation, remain fixed.

Solution: http://gfev.univ-tln.fr/PEGASUS/Hydroca ... o%20a.html

[zac]

takes an electric vibrator, nuclear is easier
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[Christophe]

takes an electric vibrator, nuclear is easier
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Uh sorry I don't see the connection at all ... we're not talking about Vaseline ...

[zac]

ok but in a modern country with the light on the wall what is the use of candles

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[Christophe]

ok but in a modern country with the light on the wall what is the use of candles

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The answer is in the title of the Topic !! It is purely instructive ... for our culture what ...