Principle

The standard molar enthalpies of formation
ΔBHΦ are important compiled thermodynamic
tabulation quantities for calculating standard enthalpies of
reaction for any arbitrary reaction. They are defined as the heat
of reaction occurring in the direct formation of one mole of the
pertinet pure substance from the stable pure elements at constant
pressure. For spontaneous and quantitative formation reactions,
e.g. the conversion of carbon and oxygen to CO2,
standard enthalpies of formation can be measured directly using
calorimetry. Alternativly, they can be calculated from known
entahlpies of reaction using Hess’ law.

Tasks



Determine the enthalpies of
reaction for the combustion of carbon and carbon monoxide
calometrically.



Use the experimentally determined
enthalpies and Hess’ law to calculate the enthalpies of formation
of CO and CO2.



What you can learn about


First law of thermodynamics

Thermochemistry

Calorimetry

Enthalpy of formation

Enthalpy of reaction

Hess’ law


Necessary accessories


Precision balance 620g/0.001g