Calculate the enthalpy of formation (kJ/mol) of MgO(s). The enthalpy of reaction for the equation as written is 100.8 kJ/mol. If the answer is negative, enter the sign and then the magnitude.

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Calculate the enthalpy of formation (kJ/mol) of MgO(s).The enthalpy of reaction for the equation as written is -100.8 kJ/mol. If the answer is negative, enter the sign and then the magnitude.

Given:  

,

The enthalpy of formation of MgO(s) is -601.7 kJ/mol

Explanation:

Enthalpy change is defined as the difference in enthalpies of all the product and the reactants each multiplied with their respective number of moles.

The equation used to calculate enthalpy change is of a reaction is:

For the given chemical reaction:

The equation for the enthalpy change of the above reaction is:

We are given:

Putting values in above equation, we get:

Hence, the enthalpy of formation of MgO(s) is -601.7 kJ/mol

1. they vary with a higher number because boiling is way hotter than melting