Hi this is my first post here.(adsbygoogle = window.adsbygoogle || []).push({});

I am attempting to calculate how long it takes for a soda can(355ml) to change from Current room temperature(75F), to say 38F, however the refrigerator or ambient temperature in this case is 35F.

I was given a corollary from a friend, but the values I get in return are way off.

t = pV/hA * LN[ (T1 - Ta)/(T2 - Ta) ]

t= [(988.9 kg/m3 )(0.000355 m3 )]/[(255W/m2K)(.0277m2)] * LN[ (75 - 35)/(38 - 35)]

I attempted to use metric for all the units.

p=density

V=Volume

A=surface area

h= convection coefficient of water or the aluminum can?

T1 and T2 are the initial and final temperatures of the drink.

Ta is the ambient temperature.

However I plug-in the equation it seems to not output realistic data. I'll get something like .5 seconds depending on what variables I plug in/manipulate.

Is my equation incorrect or my units incorrect? Also are their any other better equations to do this with? This is driving me mad, please help.

Ideally I need to figure out a working base equation, as well as know what each unit is.

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# Time required for a liquid to change in Temp (thermo)

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