Question

1.55-kg block of copper from 33.0°C to 77.5°C? The specific heat capacity of solid copper metal is 0.385 J/gK. How many joules of heat are needed to raise the temperature of a 1.55-kg block of copper from 33.0°C to 77.5°C? 5.58 × 10-6 J 1.79 × 105 J 0.00558 J 2.66 × 104 J 26.6 J

Answer 1

Answer: 26.6 J

Explanation:

The heat needed to raise the temperature of a solid body, using only  a conductive process, has been empirically showed to be equal to the following expression:

Q= c . m.  (t2 – t1)

where c= specific heat capacity (in J/gK), m= mass of the solid (in g) ,

and (t2 - t1)= difference between final and initial temperatures.

Replacing by the values, we get:

Q= 0.385 J/gK . 1,550 g. (77.5ºC – 33.0ºC)= 26.6 J