Calculate the enthelpy of the reaction

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Discussion Overview

The discussion revolves around calculating the enthalpy of a reaction between calcium and water, specifically focusing on the experimental setup involving an ice calorimeter. Participants are addressing both the chemical equation for the reaction and the subsequent calculations needed to determine the enthalpy change.

Discussion Character

  • Homework-related

Main Points Raised

  • One participant presents a homework problem involving the reaction of calcium with water and seeks assistance with calculating the enthalpy change.
  • The participant mentions a formula for mass based on the change in volume of water in the calorimeter, but expresses uncertainty about how to proceed with the calculation of enthalpy.
  • Subsequent posts question the meaning of "m" and seek clarification on what mass is being referred to in the context of the problem.

Areas of Agreement / Disagreement

The discussion does not reach a consensus, as participants are seeking clarification and further information rather than agreeing on a specific approach or solution.

Contextual Notes

There is a lack of clarity regarding the definitions and variables used in the calculations, particularly what "m" represents in the context of the enthalpy calculation.

a.a
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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?
 

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