physics

The new equilibrium temperature of the system can be calculated by using the equation for heat transfer, Q = mc∆T. Q = heat transfer between the copper and the water, m = mass of the water (825g), c = specific heat capacity of water (4.186 J/g°C), ∆T = the equilibrium temperature (T2) - the initial temperature of the water (12°C). Q = 825g x 4.186J/g°C x (T2 - 12°C) T2 = (Q + m(T1))/mc T2 = (245g x 285°C + 825g x 12°C) / (825g x 4.186J/g°C) T2 = 79.4°C Therefore, the equilibrium temperature when a 245g block of copper at 285°C is placed in a 145g calorimeter aluminum cup containing 825g of water at 12°C is 79.4°C.