Question

How much energy would be absorbed as heat by 25 g of iron when heated from 295 K to 306 K?

Answer 1

Answer:

1.2 × 10² J

Explanation:

Given data

• Mass of iron (m): 25 g

• Initial temperature: 295 K

• Final temperature: 306 K

The amount of heat (Q) that a substance absorbs depends on its specific heat capacity (c), which is the amount of heat energy required to raise the temperature of a substance per unit of mass. It can be calculated through the following expression. (cFe = 0.444 J/g.K)

$Q = c \times m \times (T_f-T_i) \\Q = \frac{0.444J}{g.K} \times 25g \times (306K-295K)\\Q = 1.2 \times 10^{2} J$