[khemkhajon]

1. The problem statement, all variables and given/known data
A 500.0-g iron bar at 212 C is placed in 2.0 L of water at 24.0 C. What will be the change in temperature of the water ( Assume no heat is lost to the surroundings.)


2. Relevant equations
(Mass of substance)(Specific Heat of substance)( Change in Temp)


3. The attempt at a solution

I am having alot of trouble with this problem. I don't fully understand how I use that forumula to find the change? I know the answer is 5 C. But I don't understand how. I was wondering if someone could explain how you come about to get this answer using the formulas cause this would be very helpful? Do I have to convert anything or what? So confused.

[MrTeo]

Start from these two facts: the heat given by the bar is the same of the heat received by water and at the end of the process there is thermical equilibrium (both metal and water have the same temperatures).

[khemkhajon]

Start from these two facts: the heat given by the bar is the same of the heat received by water and at the end of the process there is thermical equilibrium (both metal and water have the same temperatures).

Im still confused ? So does that mean that I subtract the two temperatures.

[MrTeo]

Well, you wrote "change in temperature" and this simply means to put t_metal-t_equilibrium and t_equilibrium-t_water in your equation. Using this fact you can equal the heat given by metal and taken by water.