A hot (800 K) iron nail of mass 150 g is placed into a 1.0 kg of water at 25°C. What is the common temperature of the 2 objects once they have reached thermal equilibrium? Assume no change of state of the water.
Heat capacity of iron nail is 450 J/kg/K
Heat capacity of water is 4138 J/kg/K
The Attempt at a Solution
Q lost in nail=Q gained in water
let T = final temperature
I don't know why it is negative. Can someone explain what I did wrong?