Question

How much heat is needed to raise the temperature of 100g of an iron from 25°C to
110°C?
(The specific heat of iron is 0.45 J/g∙°C).

Answer 1

Answer:

382.5J

Explanation:

Use the formula:

E = mcΔθ or Q = mcΔT

m = 100g

c = 0.45 J/g°C

ΔT or Δθ = 110 - 25 = 85°

Sub in the values:

E = 100 × 0.45 × 85

= 382.5J