Which variable is not required to calculate the gibbs free-energy change for a chemical reaction? temperature in kelvins change in entropy change in enthalpy temperature in °c?

The
Temperature in °C is not required

As Gibbs free energy change formula is:

Δ G = ΔH -TΔS

when ΔH is enthalpy change
and T is the temperature in Kelvin
and ΔS is Entropy change 
So the only factor that not required to measure ΔG is T in °C

60.0 - there are 3 significant numbers

Idon't know hope someone you