-856.7 kJ/mol is delta Gfo. Same book I used for you yesterday. Pretty good freshman text, huh? I think there is a site but this was quicker.

Okay, now I need the delta G for SiO2. Maybe you have a website or something.

Yes, very good text. Much better than the chart she printed off for us. I was going to go online and look for it, but it was easier to ask you :)

Easy Bob they call me.

To find the delta G for SiO2, you will need to use the concept of standard free energy of formation (delta G°f), similar to the value you provided for another compound. The delta G°f is the change in free energy that occurs when one mole of a compound is formed from its elements in their standard states.

If you have the standard free energy of formation (delta G°f) for SiO2, you can simply use that value to find delta G. If not, you can search for a website or database that provides the standard free energy of formation for SiO2. One such reliable resource is the NIST Chemistry WebBook (https://webbook.nist.gov/chemistry/), which provides a comprehensive collection of thermodynamic data for various compounds.

On the NIST Chemistry WebBook website, you can search for SiO2 and find its thermodynamic data, including the standard free energy of formation (delta G°f) value. Once you have that value, you can use it to calculate delta G for any given reaction involving SiO2.

Remember, the delta G value will depend on the specific reaction you are considering.

To find the standard Gibbs free energy change (ΔG°) for the formation of SiO2, you can use the standard Gibbs free energy of formation (ΔG°f) values of elements involved in the reaction. However, I'm sorry to inform you that I am currently unable to access websites or online resources. However, I can still guide you through the steps to calculate ΔG°f if you provide me with the relevant information.