What is the balanced chemical equation for the reaction used to calculate ΔH?f of BaCO3(s)? If fractional coefficients are required, enter them as a fraction (i

Chemistry Jan 18, 2021

What is the balanced chemical equation for the reaction used to calculate ΔH?f of BaCO3(s)?

If fractional coefficients are required, enter them as a fraction (i.e. 1/3). Indicate the physical states using the abbreviation (s), (l), or (g) for solid, liquid, or gas, respectively without indicating allotropes. Use (aq) for aqueous solution.

What is the enthalpy of formation of MgO(s)?

Expert Solution

1 To calculate ΔH?_f of a compound, we have to write each component in its standard state to form a reaction equation when one mole product is formed.

For the formation of BaCO₃ the reaction is:

Ba(s) + C(s) + (3/2)O₂ (g) ---> BaCO₃ (s)

2. For the formation of MgO(s) the reaction is:

Mg(s) + (1/2)O₂ (g) ---> MgO(s)

ΔH?_f of MgO(s) is -569.43 kJ/mol.

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