When 0.5 kg of aluminum is heated using a 1.5kw heater, the mass of aluminum changes completely into a liquid in 2.1 minutes. During this time its temperature remains constant at 660 Celsius. What is the specific latent heat of fusion of aluminum?

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Answer 1 · 2018-08-08T18:02:31

The latent heat of fusion of aluminium is #=378Jkg^-1#

Mass of aluminium is #m=0.5kg#

Power of the heater is #P=1500W#

The time is #t=2.1mn=126s#

The heat energy supplied to the aluminium is

#H=1500*126=189000J=189kJ#

The latent heat of fusion of aluminium is

#L_f=189/0.5=378Jkg^-1#