Help - Electrical Current vs Water temperature

[kidsquad]

Homework Statement

I am currently working on a practical investigation for my NCEA Level 3 (new zealand qualification equivalent of 7th form) Physics class and one of the requirements is to provide a suitable equation for theoretical comparison

Basically the experiment is the effects of Electrical current on water temperature through use of a heating coil (most likely Nichrome) i was wondering if anyone had such an equation.
at the moment my setup is simple with a DC powerpack and variable resistor (+ digital ammeter for measurement) to change the current going to the heating coil. I assume the equation will include the specific heat capacity of water etc and i was wondering what equation i could use to accurately predict the temperature in an ideal set-up (and preferably a description of such a setup)

Thanks in advance

 

[rock.freak667]

Normally if you apply a heat balance and you time for how long you heat the water for you will get

VIt = mc(T₂-T₁)

So you will need to measure voltage as well.

(Normally that setup is used to determine the value of the specific heat capacity c)