1.
Hm△θcHH=mc△θ=100g=17K=4.184 J/gcm3=100×4.184×17=7,112.8J
2.
I assume you meant melt 150g of icem=150gTo melt 150g of ice to water, we use; H=mLwhere L=334 J/gH=150×334H=50,100J
3.
I assume you meant melt 150g of icem=150gTo melt 150g of ice to water, we use; H=mLwhere L=334 J/gH=150×334H=50,100J
4.
Lf=500 J/gLv=1000 J/gm=10gTo melt, we use H=mLfH=10×500H=5000J
∴ 5000J is needed to melt 10g of the sample.
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