The combustion of 0.316g of benzoic acid in the same calorimeter

Click For Summary

Discussion Overview

The discussion revolves around the combustion of benzoic acid in a bomb calorimeter and its relation to determining the caloric content of a banana. Participants explore the principles of calorimetry, the relevant equations, and the concept of water equivalent.

Discussion Character

  • Homework-related
  • Technical explanation

Main Points Raised

  • One participant presents a scenario involving the combustion of banana and benzoic acid, seeking to calculate the caloric content of an average banana.
  • Another participant suggests using the equation q = m × c × ΔT, noting that in a calorimeter, the total heat capacity can be used instead of separate mass and specific heat values.
  • A participant questions the meaning of 'm' in the equation, expressing confusion about the mass involved in the calorimetry process and the concept of water equivalent.
  • One participant clarifies that 'm' refers to the mass of the substance that experiences a temperature change.

Areas of Agreement / Disagreement

Participants express varying levels of understanding regarding the principles of calorimetry and the specific variables involved, indicating that the discussion remains unresolved with multiple viewpoints on the concepts presented.

Contextual Notes

Limitations include unclear definitions of terms such as water equivalent and the specific application of the calorimetry equation in this context.

Who May Find This Useful

Students studying thermodynamics, calorimetry, or those interested in the energy content of food may find this discussion relevant.

zorro
Messages
1,378
Reaction score
0

Homework Statement


A slice of banana weighing 2.502g was burnt in a bomb calorimeter producing a temperature rise of 3.05 C. The combustion of 0.316g of benzoic acid in the same calorimeter produced a tempterature rise of 3.24 C. The heat of combustion of benzoic acid at constant volume is -3227 kJ/mol. If average banana weigh 125g, how many calories can be obtained from one average banana?


Homework Equations





The Attempt at a Solution



The concept of working of a calorimeter is not clear to me. Moreover, I don't know which equation to use. Any ideas appreciated
 
Physics news on Phys.org


q = m \times c \times \Delta T

However, for a calorimeter mc is constant, so you don't have to know both mass and specific heat separately, you can use total heat capacity instead.

--
 


'm' is the mass of what quantity?
I read about water equivalent, mass of solution, mass of water etc.
What is the meaning of water equivalent in a calorimeter?
 


m is mass of a thing that changed its temperature by delta T.
 

Similar threads

Replies
3
Views
2K
Replies
5
Views
4K
  • · Replies 10 ·
Replies
10
Views
4K
  • · Replies 3 ·
Replies
3
Views
7K
  • · Replies 12 ·
Replies
12
Views
3K
  • · Replies 7 ·
Replies
7
Views
2K
  • · Replies 5 ·
Replies
5
Views
18K
  • · Replies 8 ·
Replies
8
Views
4K
  • · Replies 1 ·
Replies
1
Views
17K
  • · Replies 4 ·
Replies
4
Views
3K