Calculate the enthelpy of the reaction

  • Thread starter Thread starter a.a
  • Start date Start date
  • Tags Tags
    Reaction
AI Thread Summary
The discussion revolves around calculating the enthalpy of a reaction between calcium and water, with a focus on the decrease in water volume in an ice calorimeter. The reaction equation needs to be established, and participants are confirming that it is a redox reaction. The calculation for enthalpy involves using the formula m = delta Volume * (-11.05), leading to a mass calculation of 2.0. However, there is confusion regarding the next steps to determine enthalpy, particularly about what the mass represents in this context. Clarification on these points is essential for completing the homework assignment.
a.a
Messages
126
Reaction score
0

Homework Statement



The reaction between 0.045 g of calcium with an excess of water was carried out in an ice calorimeter as used in this lab. The volume of water in the calorimeter decreased by 0.18 mL during the reaction
a) Write the equation for the reaction which occurs. Is it a redox reaction?
b) Calculate the enthalpy of the reaction (in kJ/mol). Show all steps of calculation.


Homework Equations



it was given on the previous page that m = delta Volume * (-11.05)

The Attempt at a Solution



I got part a, but I am having a lot of trouble with part b. I am not even sure where to start.

m = (-.18)(-11.05) = 2.0

Where do we go form here, to find the enthalpy?
 
Physics news on Phys.org


What is m?
 


mass
 


Mass of what?
 

Thread 'Prove that evolution is constant (Provide at least two arguments to support your position)'

I don't get how to argue it. i can prove: evolution is the ability to adapt, whether it's progression or regression from some point of view, so if evolution is not constant then animal generations couldn`t stay alive for a big amount of time because when climate is changing this generations die. but they dont. so evolution is constant. but its not an argument, right? how to fing arguments when i only prove it.. analytically, i guess it called that (this is indirectly related to biology, im...
View full post »

Similar threads

Chemistry Understanding the calculation of enthalpy of the formation of benzene
Replies
3
Views
2K
Chemistry Does Combusting Different Amounts of Propane Change Final Temperature?
Replies
5
Views
2K
Constant pressure heat of reaction -> constant volume q
Replies
3
Views
6K
Calculate the molar enthelpies of reaction occuring in parts A and B
Replies
1
Views
7K
Calculating Delta-H for a Reaction using a Coffee-Cup Calorimeter Method
Replies
3
Views
4K
Stuck on Reaction Enthelpy Question
Replies
7
Views
2K
Chemistry A calculation of enthalpy, entropy, and Gibbs energy of vaporization
Replies
1
Views
1K
Chemistry Thermochemistry and the heat of complete combustion
Replies
4
Views
2K
How to calculate heat from enthelpy of reaction
Replies
5
Views
2K
Chemistry How do we interpret the steps in the algorithm to balance a redox equation?
Replies
7
Views
2K

Hot Threads

Recent Insights

Back
Top