Question

(i) State the unit of latent heat of fusion in:

1. C.G.S system
2. S.I system

(ii) Name the substance which has the highest specific latent heat of fusion.

(iii) State the value of the above heat in:

1. C.G.S system
2. S.I system

Answer 1

(i) Unit of latent heat of fusion:

• C.G.S system: cal g⁻¹ (calorie per gram)
• S.I system: J kg⁻¹ (joule per kilogram)

(ii) The substance with the highest specific latent heat of fusion is ice (water).

(iii) Value of specific latent heat for ice:

• C.G.S system: 80 cal g⁻¹
• S.I system: 336000 J kg⁻¹ (or 3.36 × 10⁵ J kg⁻¹)