A 155 g aluminum cylinder is removed from a liquid nitrogen bath, where it has been cooled to -196 degrees c. The cylinder is immediately placed in a insulated cup containing 80g of water at 15 degrees c. What is the equilibrium temperature of this system?

Answer 1

heat gained by Al equals heat lost by H2O

(mass Al) * (temp change Al) * (specific heat Al) =
(mass H2O) * (temp change H2O) * (specific heat H2O)

the temperature changes are from the starting temperatures
to the equilibrium temperature

Answer 2

Thank you!