Question

What is the balanced chemical equation for the reaction used to calculate ΔH∘f of SrCO3(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.

Answer 1

`Sr(s)+C(s)+ 3/2O_(2)(g)\rightarrow SrCO_(3)(s)`

Step-by-step explanation:

The standard enthalpy of formation (ΔH°f) is defined as the enthalpy change which accompanies the formation of 1 mole of a compound from its constituent elements all of which are in their standard states i.e. either solid (s), liquid (l) , gas (g) or the aqueous phase (aq).

Strontium carbonate (SrCO3) contains 3 elements:

-Strontium (Sr) where the standard state is solid(s)

- Carbon (C) where the standard state is again a solid (s)

- oxygen (O) where the standard state is the gas phase (g)

The balanced chemical equation for the standard enthalpy of formation (ΔH°f) for SrCO3 would be:

`Sr(s)+C(s)+ 3/2O_(2)(g)\rightarrow SrCO_(3)(s)`

Answer 2

Based on your problem above, we have to balance the equation in order to get the product.
From your given, ΔH∘f of SrCO3(s)
The balanced equation is:
Sr(s) + C(s) + 3/2 O2(g) -> SrCO3(s)