The specific heat capacity of solid lead is 0.159J/g°C, the molar enthalpy of fusion is 5.0kJ/mol, and the melting point of lead is 328°C.
2006-09-23 08:21:49 · 2 answers · asked by Atonz T 2 in Science & Mathematics ➔ Chemistry
Melting Point: 327.5 °C
If you're going to do it, use the right information.
The specific heat capacity of lead :
lead Cg = 0.13
The amount of heat energy gained or lost by a substance can also be calculated for moles of substance:
q = n x Cn x (Tf - Ti)
q = amount of heat energy gained or lost by substance
n = moles of substance
Cn = molar heat capacity (J oC-1 mol-1 or J K-1 mol-1)
Tf = final temperature
Ti = initial temperature
2006-09-23 08:31:43 · answer #1 · answered by oklatom 7 · 0⤊ 0⤋
You need to calculate the energy needed to raise the temperature of solid lead from 25 degrees C to its melting point. The equation is q=mass*c(delta T). Then you need to calculate the energy required to melt that mass of lead from the enthalpy of fusion and the number of moles of lead in 100 g of lead. Get your paper and your calculator out, and this should get you there.
2006-09-23 15:31:27 · answer #2 · answered by hcbiochem 7 · 0⤊ 0⤋