When 1.00 kg lead (specific heat = 0.13 J / g °C)at 100 °C is added to a quantity of water at 28.5 °C, the final temperature of the lead – water mixture is 35.2 °C. What is the mass of water present?
Heat lost by lead is equal to the heat gained by water (assuming no heat loss to the surroundings). The heat lost by lead can be found directly:
The specific heat of water is known to be 4.184 J/goC.
Answer: 301 g