Question

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

Answer 1

Answer:

Option C (6750 J) is the appropriate response.

Explanation:

The given values are:

Mass of iron,

m = 3 kg

Specific heat capacity,

$c_A$ = 0.450

Temperature,

T = $25-20$

  = $5^{\circ}C$

Now,

⇒  $Q=mc_A T$

On substituting the values, we get

⇒      $=3\times 0.450\times 5$

⇒      $=6.75$

i.e,

⇒      $=6750 \ J$