NSS1 Phy cal
2009-10-29 2:20 am
If the mass of a substance used is 0.05 kg and the rate of energy loss to the surroundings at its melting point is 20 J per second, find the specific latent heat of fusion of the substance.
回答 (1)
2009-10-29 6:12 am
✔ 最佳答案
Your question is incomplete. The time for solidification is not given. This should be found from the experiment.Let this time for the substance to solidify be t (in sec.)
then, energy released by the substance to the surroundings
= 20t J
thus, 0.05L = 20t where L is the latent heat of fusion
i.e. L = 20t/0.05 J/kg
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