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4 years ago

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How much energy, in joules, is released when 17 kilograms of granite is cooled from 45°C to 21°C?

2 answers:

zepelin [54]4 years ago

4 0

The final answer is -322, 320 Joules. The solution for the problem is:

The equation that must be used in this problem is:

U = mCp(Tf-Ti)

where:
U = energy released or absorbed in Joules
m = mass in kg
Cp = specific heat of material in J/kg-C
Tf = final temperature, C
Ti = initial temperature, C

Looking up the Cp of granite gives a value of 790 J/kg-C.

U = 17kg (790 J/kg-C) (21-45)
<span>U = - 322, 320 Joules (negative means heat is released)</span>

pashok25 [27]4 years ago

4 0

The awnser would be D

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3 years ago

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Answer:

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Answer:

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Explanation:

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3 years ago