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# A 90W immersion heater is used to supply energy for 5 minutes. The energy s...

### Question

A 90W immersion heater is used to supply energy for 5 minutes. The energy supplied is used to completely melt 160g of a solid at its melting point. Calculate the specific latent heat of the solid.

A) 2.81 Jg-1

B) 6.25 Jg-1

C) 8.89 Jg-1

D) 168.75 Jg-1

E) 5333.33 Jg-1

### Explanation:

Pt = mL
90 x 5 x 60 = 160 x L
L = $$\frac{27000}{160}$$
= 168.75 Jg-1

## Dicussion (1)

• Pt = mL
90 x 5 x 60 = 160 x L
L = $$\frac{27000}{160}$$
= 168.75 Jg-1

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