How much heat in kJ is given out when 85.0 g of lead cools from 200.0 C to 10.0 C?

To calculate the heat released, you can use the formula Q = mcΔT, where Q is the heat, m is the mass, c is the specific heat capacity (0.128 J/g°C for lead), and ΔT is the temperature change. First, convert the mass to kilograms (85.0 g = 0.085 kg) and then calculate Q using the specific heat capacity of lead to get the answer in joules. Finally, convert joules to kilojoules (1 kJ = 1000 J) to find the heat released.