A large lump of aluminium of mass 2kg at 700C is dropped into a polystyrene cup of water of mass 2kg at 20C.
What is the mass of water that will be vapourized away?
(Given: specific heat capacity of aluminium = 900Jkg-1C-1
specific heat capacity of water = 4200 Jkg-1C-1
specific latent heat of vaporizarion of steam= 2.26x10^6 Jkg-1)
PHY help !!!! Heat
2013-04-20 10:05 pm
回答 (1)
2013-04-20 11:33 pm
✔ 最佳答案
(2)(4200)(100-20)+m(2.26*10^6) = 2(900)(700-100)672000+m(2.26*10^6)=1080000
m(2.26*10^6)=408000
m=0.181kg(corr.to 3sig.fig.)
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