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.

The correct option is (c).

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 :

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

the answer is c

tell me if wrong

atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8