A piece of solid lead weighing
32.6 g at a temperature of 311 °C
is placed in 326 g of liquid lead
at a temperature of 367 °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.
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A piece of solid lead weighing 32.6 g at a temperature of 311 °C is placed...
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