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. 2.81jg-1
B. 6.25Jg-1
C. 8.89Jg-1
D. 168.75Jg-1
E. 5333.33Jg-1

Correct Answer: Option D

D. 168.75Jg-1

pt = ml 80

90 x 5 x 60 = 160 x L

L = 27000/160

= 168.75Jg-1

= 168.75