A 90-W immersion heater is used to supply energy for five minutes. The energy supplied is used to completely melt 180g of a solid at is melting point. Neglecting energy losses to the surroundings, calculate the specific latent heat of fusion of the solid
- 0.5Jg-1
-
2.5Jg-1
- 15.0Jg-1
- 450.0Jg-1
- 150Jg-1
The correct answer is: B
Explanation
Pt = mLL = \(\frac{pt}{m} = \frac{90 \times 5}{180}\)
= 2.5