# Thermodynamics: Einstein solid (simple step in derivation)

1. Sep 22, 2013

### iScience

S=kln($\frac{eq}{N}$)N --->= S=Nkln($\frac{q}{N}+1$)

i understand that the e goes away and the N exponent comes down but where does the +1 come from?

2. Sep 22, 2013

### Dick

That's not even right. kln((eq/N)^N)=Nk(1+ln(q/N)). Use more parentheses to show what you really mean. Just use rules of logarithms, and show how you are using them.

3. Sep 23, 2013

### iScience

there are no more parentheses that's what's in my book. is this even an approximation??

4. Sep 23, 2013

### Dick

No, I think it's just wrong.