How to tell how fast temerature changes.

[avolaster]

I studied calorimetery in physics, but reflecting upon old equations i can't seem to find one that will tell me how long it takes to change the temerature of the substance. I'm mainly looking for how fast water will change temperature. I'm guessing that the rate in which it changes depends on the initial and final temerature, the mass maybe of each... i really don't know. if anyone knows an equation to this... I'm sure its simple and i just can't seem to find it. btw i did google it and had no luck. thanks ahead of time.

 

[AtomicJoe]

I think you need to look at the specific heat capacities.

http://en.wikipedia.org/wiki/Heat_capacity

http://www.engineeringtoolbox.com/water-thermal-properties-d_162.html

 

[Curl]

I think he is asking about heat rates not steady heat transfer.

The dynamics are described using the heat equation which is essentially conservation of energy + fourier's conduction law. The rate of temperature change with time can be seen from that formula. Take a look:
http://en.wikipedia.org/wiki/Heat_equation