How much heat, in joules and in calories, must be added to a 75.0–g iron block with a specific heat of 0.449 j/g °c to increase its temperature from 25 °c to its melting temperature of 1535 °c?
Given: m = 75.0 g, the mass of the iron block c = 0.449 J/(g-°C), the specific heat of iron Tm = 1535 °C, melting temperature T0 = 25 °C, initial temperature.
Sensible heat required to raise the temperature of the iron is given by Q = mc(Tm - T0) = (75 g)*(0.449 J/(g-°C))*(1535 - 25 °C) = 50849.25 J = 50.849 kJ
