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algol [13]
3 years ago
6

Truebor false is a substance is made of equal parts,the substance is knowns as complex substance

Chemistry
1 answer:
Alex3 years ago
6 0
False i think im not sure
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A goldsmith melts 12.4 grams of gold to make a ring. The temperature of the gold rises from 26°C to 1064°C, and then the gold me
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Problem One

You will use both m * c * deltaT and H = m * heat of fusion.

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m = 12.4 grams

c = 0.1291

t1 = 26oC

t2 = 1204

heat of fusion (H_f) = 63.5 J/grams.

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H = m * c * deltaT + m * H_f

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H = 2447.5 or 2447.47 is the exact answer. I have to leave the rounding to you. I have no idea where to round it although I suspect 2450 would be right for 3 sig digs.

Problem Two

Formula and Givens

t1 = 14.5

t2 = 50.0

E = 5680

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m = ??

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Solution

5680 = m * 4.186 * (50 - 14.5)

5680 = m * 4.186 * (35.5)

5680 = m * 148.603 * m

m = 5680 / 148.603

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m = 38.2 to 3 sig digs.

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3 years ago
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