Question

# A piece of solid lead weighing 34.2 g at a temperature of 315 °C is placed...

A piece of solid lead weighing 34.2 g at a temperature of 315 °C is placed in 342 g of liquid lead at a temperature of 376 °C. After a while, the solid melts and a completely liquid sample remains. Calculate the temperature after thermal equilibrium is reached, assuming no heat loss to the surroundings.

The enthalpy of fusion of solid lead is ΔHfus = 4.77 kJ/mol at its melting point of 328 °C, and the molar heat capacities for solid and liquid lead are Csolid = 26.9 J/mol K and Cliquid = 28.6 J/mol K.

What is the answer in degrees celcius

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