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particular smelting furnace is capable of delivering 375 kcal of heat to a solid block of lead?
A particular smelting furnace is capable of delivering 375 kcal of heat to a solid block of lead that has previously been heated to its melting point of 328 C.
How many Joules (J) of heat are in 375 kcal? & If the entire block of lead is melted with no heat to spare, what was its mass?
1 Answer
- billrussell42Lv 73 years ago
First is just a conversion from kcal to J
375 kcal = 1569000 J
Lead Heat of fusion 4.77 kJ/mol
atomic mass 207.2 g/mole
1569 kJ = 4.77 kJ/mol x M
M = 329 mole
329 mole x 207.2 g/mole = 68200 g or 68.2 kg
