Calculating Enthalpy for CaCl2+H20 -> Ca+2HCl

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SUMMARY

The discussion focuses on calculating the theoretical enthalpy for the reaction CaCl2 + H2O → Ca + 2HCl. Participants confirm that using standard enthalpies of formation for each product is appropriate, in accordance with Hess's law. The equation delta H = m * c * delta T is also mentioned as a relevant formula for this calculation. Overall, the consensus emphasizes the application of Hess's law for accurate enthalpy determination.

PREREQUISITES
  • Understanding of Hess's law
  • Familiarity with standard enthalpies of formation
  • Knowledge of thermochemical equations
  • Basic principles of calorimetry
NEXT STEPS
  • Research the standard enthalpies of formation for CaCl2, H2O, Ca, and HCl
  • Study Hess's law applications in thermochemistry
  • Explore the calculation of enthalpy changes using calorimetry
  • Learn about the implications of percent error in thermodynamic calculations
USEFUL FOR

Chemistry students, educators, and anyone involved in thermodynamics or chemical reaction analysis will benefit from this discussion.

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Homework Statement



I need to find a theoretical enthalpy for a reaction so that I can find a percent error.
the reaction is:
CaCl2+H20 =>Ca)+2HCl

Homework Equations



delta H=m*c*delta T

The Attempt at a Solution


Should I use the enthalpies of formation for each of the products?
 
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According to Hess's law, standard enthalpies of formation will work.
 
yeah, Hess's law is the way to go. and have fun with thermochem. it was hell for my class last year. i hope you survive.
 

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