Burning Nuts: Questions & Answers

  • Thread starter Thread starter Roxy
  • Start date Start date
  • Tags Tags
    Nuts
Click For Summary

Discussion Overview

The discussion revolves around the burning of nuts in an experimental context, focusing on the composition of nuts, the energy content of different macronutrients, and the chemical processes involved in energy release during combustion. Participants seek clarification on specific questions related to the experiment.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • Some participants question which part of the nut is burned, suggesting it may be the fat content.
  • There is a discussion about the composition of nut oil, with some stating it is primarily fat or triglycerides.
  • Participants explore why nuts may contain more energy than carbohydrates or proteins, with references to chemical potential energy and oxidation processes.
  • One participant provides specific nutritional information for walnuts, detailing protein, lipid, carbohydrate, and fiber content.
  • There is a comparison of energy release from fats, proteins, and carbohydrates, with some participants noting that fats release more energy due to their chemical structure.
  • Questions arise regarding whether proteins contain -OH bonds, with differing views on their energy release compared to fats and carbohydrates.

Areas of Agreement / Disagreement

Participants express varying views on the composition of nut oil and the energy content of macronutrients. There is no consensus on the specific chemical processes or the exact reasons for differences in energy release among fats, proteins, and carbohydrates.

Contextual Notes

Some participants reference specific data from biology texts, but there is no agreement on the interpretation of energy release values or the chemical structures involved.

Roxy
Messages
52
Reaction score
0
We did this experiment where we had to burn nuts. And I did not get these questions, can someone help me with them?

1) What part of the nut is burned? (is it the fat part??)
2) What is nut oil composed of?? (is it fat??)
3) Why does "nut" contain more energy than carbs or protein?? (?)
 
Biology news on Phys.org
What is the energy/dietary content of your type of nuts? What is the maine ingredient for energy.

As for oil content, it is basically Carbon and hydrogen and the number of carbon will have an impact on the potential energy of the molecule.
 
What is the energy/dietary content of your type of nuts?
695 kcal/100g??
What is the maine ingredient for energy.
fat, oil?
 
Roxy said:
What is the energy/dietary content of your type of nuts?

I was talking more in the line of the follwing

Walnuts
Protein 17.148 g
Total lipid (74.244 g
Carbohydrate 22.008 g
Fiber 5.760 g

http://www.moondragon.org/nutrition/foodguide/nutwalnut.html

That give you what part could be burned.

Roxy said:
What is nut oil composed of

Satured fatty acid, unsaturated, cholesterol, etc.
 
Last edited by a moderator:
I think I got it now. Thank You :)
 
Roxy said:
We did this experiment where we had to burn nuts. And I did not get these questions, can someone help me with them?

1) What part of the nut is burned? (is it the fat part??)
2) What is nut oil composed of?? (is it fat??)
3) Why does "nut" contain more energy than carbs or protein?? (?)

Yep the oil is fat ( or triglycerides).


The nut "contains" more energy (releases more energy) because chemically, it has the most potential to create C=O bonds (carbon double bond to oxygen) in CO_2, which releases the most energy (exothermic).
This process in oxidation.
Carbohydrates are already partially oxidised, because they already contain many -OH bonds (have a look at the molecular structure of, say, glucose), so they don't release as much energy as fats.
 
endeavour said:
Yep the oil is fat ( or triglycerides).


The nut "contains" more energy (releases more energy) because chemically, it has the most potential to create C=O bonds (carbon double bond to oxygen) in CO_2, which releases the most energy (exothermic).
This process in oxidation.
Carbohydrates are already partially oxidised, because they already contain many -OH bonds (have a look at the molecular structure of, say, glucose), so they don't release as much energy as fats.

Do priteins also contain -OH bonds ??
Thanks
 
Roxy said:
Do priteins also contain -OH bonds ??
Thanks
I see where you're coming from.
But actually proteins don't really. Fats release more energy (39.4 kJ/g) than proteins (17.9 kJ/g) and carbohydrates (15.8kJ/g) - they have very long chains of -C-H bonds and have more potential to make CO2[/size] (and H2[/size]O. as oxidation produces water and carbon dioxide) as I mentioned above. In my posts I should've add a bit more detail and mentioned that the carbohydrates bonds are -C-O-H bonds (ie they have some CH bonds too, but they are partially oxidised). Proteins have a few -C-H bonds in comparison to fats.

*data was from my biology book, and as you can see carbohydrates and proteins are actually similar in releasing energy.
 

Similar threads

Replies
3
Views
2K
  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 1 ·
Replies
1
Views
1K
  • · Replies 4 ·
Replies
4
Views
5K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 19 ·
Replies
19
Views
11K
  • · Replies 6 ·
Replies
6
Views
3K
  • · Replies 3 ·
Replies
3
Views
3K
  • · Replies 23 ·
Replies
23
Views
8K
  • · Replies 4 ·
Replies
4
Views
3K