The formula of the heat needed to rise the temperature of a substance is:
Heat = m*Cp*ΔT
Where m is the mass = 55.8 g
Cp is the specifif heat of the iron = 0.450 j / g°C
ΔT is the raise of the temperature = 49.0°C - 25.0 °C = 24.0°C
=> heat = 55.8 g * 0.450 j/g°C * 24.0 °C = 602.6 j = 603 j
Answer: 603 j
