Question

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

Answer 1

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