Question

explain formation of CO2 with Hess law?
don't give any un useful answers ​

Answer 1

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Hess's Law of Constant Heat Summation (or just Hess's Law) states that regardless of the multiple stages or steps of a reaction, the total enthalpy change for the reaction is the sum of all changes. This law is a manifestation that enthalpy is a state function.

Recall that standard enthalpies of formation can be either positive or negative. The enthalpy of formation of carbon dioxide at 298.15K is ΔHf = -393.5 kJ/mol CO2(g). Write the chemical equation for the formation of CO2

Answer 2

Explanation:

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.

Benefits

Glass jacket system easily expandable

Stable and safe construction due to solid stand material

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

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