Which Arrhenius Equation Version Is Correct?

[jaydnul]

When finding the activation energy, which equation is the correct one:

ln(k2/k1)=-Ea/R * (1/T2-1/T1)
or
ln(k1/k2)=Ea/R * (1/T2-1/T1)

Notice k1/k2 in the second equation. As well as the -Ea instead of Ea

Thanks

 

[sjb-2812]

Aren't they both the same? ln(a/b) = ln a - ln b = -(ln b - ln a) = -ln(b/a) ?