An iron block of mass 45.87 kg is heated from 7 c to 218

c. if the specific heat of iron is 450 j-1 kg k-1 then how much energy is required

Given:

m = 45.87 kg, mass of iron block

c = 450 / (kg-K), specific heat

T₁ = 7 C, initial temperature

T₂ = 218 C, final temperature

Energy required is

Q = m*c * (T₂ - T₁)

= (45.87 kg) * (450 J / (kg-K) (218 - 7 K)

= 4.3554 x 10⁶ J

= 4.3554 MJ

Answer: 4.36 MJ (nearest hundredth)