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這是我Chemistry的問題,請各位大大幫個忙~是比熱的問題!1. A 325-g piece of glod at 427度C is dropped into 200.0 mL of water at 22度C. The specific heat of gold is 0.131 J/g度C. Calculate the final temperature of the mixture.(Assume no heat loss to the surroundings.)2.The specific heat of zinc is 0.096 cal/g度C. Determine the energy... 顯示更多 這是我Chemistry的問題,請各位大大幫個忙~是比熱的問題! 1. A 325-g piece of glod at 427度C is dropped into 200.0 mL of water at 22度C. The specific heat of gold is 0.131 J/g度C. Calculate the final temperature of the mixture.(Assume no heat loss to the surroundings.) 2.The specific heat of zinc is 0.096 cal/g度C. Determine the energy required to raise the temperature of 250.0 g of zinc from room temperature(24度C) to 150.0度C

最佳解答:

1. water S=4.186, final T=x 325*0.131*(427-x)= 200*4.186*(x-22) 18179.525-42.575x=837.2x-18418.4 794.625x=36597.925 x=46C 2. E=250*0.096*(150-24) =3087 cal = 12922.182 J

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