Question

How much heat is absorbed by a 75g iron skillet when it’s temperature rises from 5c to 20c?

Answer 1

Answer: $Q=499.5 J$  

Explanation:

The heat (thermal energy) absorbed by the iron skillet can be found using the following equation:

$Q=m.C.\Delta T$   (1)

Where:

$Q$ is the heat  (absorbed)

$m=75 g$ is the mass of the element (iron in this case)

$C$ is the specific heat capacity of the material. In the case of iron is $C=0.444\frac{J}{g\°C}$

$\Delta T=T_{f}-T_{i}=20\°C - 5\°C= 15\°C$ is the variation in temperature

Knowing this, lets rewrite (1) with these values:

$Q=(75 g)(0.444\frac{J}{g\°C})(15\°C)$  (2)

Finally:

$Q=499.5 J$