[clumsy_panda]

How would you calculate delta G for this reaction?

H₃⁺ + CO  HCO⁺ + H₂

I'm assuming that delta G should be negative since H₂ should be much more stable than H₃⁺, but how can I calculate an exact value when all I'm given is this equation?  I've tried looking for the standard free energy of formation of H₃⁺, but I couldn't find it anywhere.

Thanks for the *delete me*