Abstract
The enthalpies of formation of liquid and solid Ca–Pb and Ba–Pb alloys have been measured by using high temperature solution calorimetry and direct calorimetry. The enthalpies of mixing of liquid Ca–Pb alloys have been measured at 1020 K and, for the Ba–Pb alloys, in the temperature range of 1070–1150 K. For the liquid alloys, a very strong compound forming tendency has been noticed. Formation and melting enthalpies have been measured for the different intermetallic compounds. For the solid alloys, the most exothermic values in the two systems are Δ f H m 0 (kJ mol −1 of atom, 300 K): Ca 2Pb −62±2 and BaPb −73±2, respectively.
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