Question

A lead block, initially at 58.5oC, is submerged into 100.0 g of water at 24.8oC, in an insulated container. The final temperature of the mixture upon reaching equilibrium is 26.2oC. What is the mass of the lead block?

Answer 1

The specific heat capacity of lead is 0.128 J/g°C.

Mass of lead block = (100.0 g)(26.2oC - 24.8oC)(0.128 J/g°C) / (58.5oC - 24.8oC)

Mass of lead block = 5.45 g