Question

How much energy is required to raise the temperature of 3 kg of iron from 20°

C to 25°C? Use the table below and this equation: Q = mcAT.

Answer 1

The correct option is (c).

Step-by-step explanation:

Given that,

Mass of iron, m = 3 kg = 3000 g

The temperature of ice increases from 20° C to 25°C.

The specific heat of iron is 0.45 J/g°C

We need to find the energy required to raise the temperature. The formula is given by :

`Q=mc\Delta T\\\\Q=3000* 0.45* (25-20)\\\\Q=6750\ J`

So, 6750 J of energy is required to raise the temperature or iron.