Question

An unknown metal with a mass of 54.0 g required 773 J of energy in order to change its temperature from 63.0 C to 100.0 C. What is the identity of this metal?

Answer 1

Answer:

Metal is copper.

Explanation:

Mass of a metal, m = 54 g

Heat energy required, Q = 773 J

The temperature changes from 63.0 °C to 100.0 °C.

We need to identify the metal. Heat required to raise the temperature is given by :

$Q=mc\Delta T$

c is specific heat of the metal

We can identify the metal by finding its specific heat.

$c=\dfrac{Q}{m\Delta T}\\\\c=\dfrac{773}{54\times (100-63)}\\\\=0.386\ J/g^{\circ} C$

The metal is copper. Its specific heat is $0.386\ J/g^{\circ} C$.