What is enthelpy for combustion of glucose?

Click For Summary
To calculate the enthalpy for the combustion of 1 mole of glucose, the enthalpy of formation values for glucose, carbon dioxide, and water are essential. The combustion reaction can be analyzed using Hess's law, which states that the total enthalpy change is the sum of the enthalpy changes for individual steps. The relevant enthalpy values are ∆(Glucose) = −1,268 kJ/mol, ∆(Carbon Dioxide) = −393.5 kJ/mol, and ∆(Water) = −285.8 kJ/mol. Understanding these concepts is crucial for solving thermodynamic problems related to combustion. The discussion emphasizes the need for a structured approach to homework problems in chemistry.
i_hate_math
Messages
150
Reaction score
2
The enthalpies of formation with reference to (2) are: ∆(Glucose)= −1,268 /, ∆(Carbon Dioxide)= −393.5 ./, ∆(water)= −285.8 /.

How do I calculate the enthalpy for the combustion of 1 mole of glucose?

I know H = U + PV and ∆H = Q + Wother, but I am confused by all the chemistry involved!
 
Science news on Phys.org
Have you heard of Hess's law?
 
  • Like
Likes i_hate_math
No I haven't. This was a question in a past exam that I'm stuck on, it could be unrelated. Was I right to consider it as a purely thermodynamic (2nd year physics level) problem?
 
This should be posted in a homework forum with an attempt at a solution.

Thread closed.
 

Similar threads

Understanding Enthalpy: Confusion Cleared Up | Thermodynamics Course"
  • · Replies 14 ·
Replies
14
Views
3K
Pressure in a bomb calorimeter at the moment of combustion
  • · Replies 1 ·
Replies
1
Views
1K
Chemistry Does Combusting Different Amounts of Propane Change Final Temperature?
  • · Replies 5 ·
Replies
5
Views
2K
What is the heat of combustion of 1 kg carbon dioxide w/ magnesium?
  • · Replies 2 ·
Replies
2
Views
2K
Chemistry Understanding the calculation of enthalpy of the formation of benzene
  • · Replies 3 ·
Replies
3
Views
3K
Automotive Loss of gaseous volume because of fuel combustion
  • · Replies 2 ·
Replies
2
Views
2K
How to prepare 500 mL of 0.025 M of Glucose solution?
  • · Replies 5 ·
Replies
5
Views
7K
Calculate the change in entropy for the system and the surroundings
  • · Replies 13 ·
Replies
13
Views
4K
How do I calculate the enthelpy of formation using combusion data
  • · Replies 9 ·
Replies
9
Views
6K
Why is enthelpy of combustion 0Kjmol-1 for oxygen
  • · Replies 2 ·
Replies
2
Views
2K