What data do you need to determine whether the following reaction is spontaneous or not?
4Fe(s) + O2(g) ----> 2Fe2O2(s)
Would it be temperature, delta H and delta S?
You need dG. If you don't have that, you can calculate it from dG = dH - TdS
Should I write both just to be sure or is delta G the only answer I need?
I don't know what your instructions are. One answer is all that you have given; i.e., T, dH and dS because you can calculate dG from those three.
If I had a choice I would choose dG.
To determine whether a reaction is spontaneous or not, you need to consider the Gibbs free energy (ΔG) of the reaction. ΔG can be calculated using the equation:
ΔG = ΔH - TΔS
Where:
- ΔH is the change in enthalpy (heat) of the reaction
- T is the temperature in Kelvin
- ΔS is the change in entropy (disorder) of the reaction
Therefore, in order to determine whether the given reaction is spontaneous or not, you would need:
1. The values of ΔH, which represents the heat absorbed or released during the reaction.
2. The value of ΔS, which represents the change in disorder of the system.
3. The temperature (T) at which the reaction is being carried out.
By plugging these values into the equation for ΔG, you can determine the spontaneity of the reaction. If ΔG is negative, the reaction is spontaneous, whereas if ΔG is positive, the reaction is non-spontaneous.