Question

calculate the specific latent heat of fusion if solid if 25g of it requires 8400j of heat energy for melting

Answer 1

Mass of solid = 25g

Energy required for melting it completely = 8400J

Latent heat of fusion is the amount of heat energy required for melting one unit mass of a substance.

Here unit mass = 1g

So specific latent heat of fusion = 8400/25 = 336 J/g

Specific latent heat of fusion is 336 J/g.

In SI unit, specific heat is calculated as J/kg.

So for 1 kg, energy required will be = 336×1000 = 3.36 × 10^5 J/kg

Specific heat = 3.36×10^5 J/kg

Answer 2

Given :

• Mass = 25gm,
• Energy = 8400J.

To find :

• Calculate the specific latent heat of fusion of a solid.

Using formula :

★ Specific latent heat = Energy/Mass.

　

Calculations :

→ 8400/25

→ 336

→ 336 (1000)

→ 3.36 × 10^5 J/kg

Therefore, 3.36 × 10^5 J/kg is specific latent heat.