Question

A piece of aluminum requires 4,000 J of energy to change
from 68°C to 110° C. How much aluminum is there?

need help

Answer 1

Answer:

Mass, m = 105.58 g

Explanation:

We have,

Heat required in aluminium to change the temperature from 68°C to 110°C. It is required to find the mass of aluminium.

Concept used : Specific heat capacity

Solution,

The heat required to raise the temperature is given by :

$Q=mc\Delta T$

c is specific heat capacity, for Aluminium, c = 0.902 J/g-°C

$m=\dfrac{Q}{c\Delta T}\\\\m=\dfrac{4000\ J}{0.902\ J/g^{\circ} C\times (110-68)^{\circ} C}}\\\\m=105.58\ g$

So, the mass of aluminium is 105.58 grams.