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

WAEC 1991

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

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Correct Answer: Option D

Explanation

pt = ml 80

90 x 5 x 60 = 160 x L

L = \(\frac{27000}{160}\)

= 168.75Jg^-1

= 168.75

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

Correct Answer: Option D

Explanation

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