I don't think my second question was answered correctly. I don't think the thermodynamic properties of the Al was factored in to the answer. So I will try again

I'm trying to determine how long it takes 1000 grams of H20 and 1000 grams of Al to reach something close to thermoequilibrium. My first question that was posted asked what temperature the two materials would reach and when. The answer was 15.5 Celcius, but the expert pointed out true equilibrium in an infinitely long process. So I changed the question to, how long does it take the H20 to cool down to 16 C.

To review, I have a insulated rectangular containing holding 1000 cc's or mgs of H20 sitting on top of a similarly shaped block of 1000 mgs of solid aluminum in an insulated box. The 1000 cc's of H20 has a temp of 22C The 1000 mgs of Al has a temp of -10C. The two containers have an open end so that the AL and H20 have contact with one another on a surface area of 0.0288 m^2. The water does not spill or move. How long does it take for heat transfer from the warmer H20 to the colder Al to bring the temperature of the water down to 16 C?