1. The problem statement, all variables and given/known data http://postimage.org/image/9artvc1h5/ see attached 2. Relevant equations ΔS=Q/T 3. The attempt at a solution The real issue I'm having is how to go about solving this, I think I'm going to need to use kinematics to find the time the gold is exposed to the air correct? but then I'm not sure how to use that time value or anything. My book has no problems like this. Any and all guidance will be greatly appreciated.