What Is the Free Energy Change for the Reaction SiO₂(s) $\rarr$

question 8

Multiple Choice

What is the free energy change for the reaction SiO₂(s) + Pb(s) $\rarr$ PbO₂(s) + Si(s)
$\Delta$ G ^$\circ$ _f (PbO₂) = -217 kJ/mol
$\Delta$ G ^$\circ$ _f (SiO₂) = -856 kJ/mol

• A) 619 kJ/mol
• B) 639 kJ/mol
• C) 659 kJ/mol
• D) 679 kJ/mol
• E) None of the above

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