05-10-2018, 06:31 PM

This is a tricky question or so it seems: (d= delta)

The standard Gibbs energy change, dG, for a certain chemical reaction is -10 kJ/mol. What is the equilibrium constant at 300 K?

So I thought this would be easy... dG= -RTlnK. But they gave me standard dG. I need to find the dG at 300 K in order to do this problem. At first I thought maybe getting K for the standard (298 K) reaction and then using van't hoff equation to find K at 300 K but I have no way of finding out dH when I don't know dS or the actual reaction. Please help.

The standard Gibbs energy change, dG, for a certain chemical reaction is -10 kJ/mol. What is the equilibrium constant at 300 K?

So I thought this would be easy... dG= -RTlnK. But they gave me standard dG. I need to find the dG at 300 K in order to do this problem. At first I thought maybe getting K for the standard (298 K) reaction and then using van't hoff equation to find K at 300 K but I have no way of finding out dH when I don't know dS or the actual reaction. Please help.