Question

Calculate the mass of copper if 3687.9 J of copper is cooled from 155 oC to 23 oC.
The specific heat of copper is 0.385 J/g*oC.

Answer 1

Answer on Question #73465 – Chemistry – Other

Task:

Calculate the mass of copper if 3687.9 J of copper is cooled from 155 °C to 23 °C. The specific heat of copper is 0.385 J/g*°C.

Solution:

$Q = mc\Delta T$, where $Q$ is the amount of heat energy lost or gained, $m$ is the mass in grams, and $\Delta T$ is the change in temperature, Tfinal–Tinitial.

$$Q = m * c * \Delta T$$ $$m(Cu) = \frac{Q}{c * (T_2 - T_1)} = \frac{3687.9}{0.385 * (155 - 23)} = \frac{3687.9}{50.82} = 72.5679g$$ $$m(Cu) = 72.6g$$

Answer: $m(Cu) = 72.6g$.

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