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?

Question

2880 views around the world

You can reuse this answer
Creative Commons License

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#