Question

The specific latent heat of fusion for a material is 45 kJ/kg Calculate the energy required to change 5 kg of the material from solid to liquid.​

Answer 1

225 kJ

Step-by-step explanation:

The energy required to change a substance from solid to liquid at constant temperature is given by:

Q = mL

where Q is the energy required, m is the mass of the substance, and L is the specific latent heat of fusion.

In this case, we have a specific latent heat of fusion of 45 kJ/kg and a mass of 5 kg. Therefore, the energy required to change 5 kg of the material from solid to liquid is:

Q = mL = 5 kg x 45 kJ/kg = 225 kJ

So, the energy required to change 5 kg of the material from solid to liquid is 225 kJ.