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Alexus [3.1K]
2 years ago
8

How much heat is released when 0.762 mol of copper cools from 81.6°C to 52.2°C?

Chemistry
1 answer:
andriy [413]2 years ago
8 0

Answer:

548.089  J

Explanation:

-The molar mass of copper is 63.546 grams.

-We obtained the mass of 0.762 moles of copper:

mass =moles\times molar\ mass\\\\\\=0.762\times 63.546\\\\=48.422\ g

-We apply the specific heat formula to calculate the amount of heat released:

q=mC\bigtriangleup T\\\\\\=48.422\ g\times 0.385 \ J/g\textdegree C\times (81.6-52.2)\textdegree  C\\\\\\=548.089  J

Hence, the amount of heat released is 548.089  J

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The Spirit of America Goodyear blimp has a volume of 2.027×105 ft3. Convert this volume to an SI unit with the basic unit L.
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                    As we know one cubic foot is equal to 28.3168 L. Using this relation we can convert 2.027 × 10⁵ ft³ into L as,

                                                 1 ft³  =  28.3168 L

So,

                                              2.027 × 10⁵ ft³  =  X L

Solving for X,

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