Question

How much heat energy in kJ is required to melt a 45kg of ice?

Answer 1

Answer: 14,985

Explanation: WE KNOW THAT TO MELT 1 KG OF ICE WE NEED 333 KJ OF HEAT ENERGY, THEREFORE TO MELT 45 KG OF ICE , WE NEED

[45*333]KJ=14985 KJ

ALSO TO FIND THE HEAT ENERGY REQUIRED TO MELT 1 KG OF ICE ,WE NEED TO DO THIS

AS WE KNOW THE LATENT FUSION OF WATER IS 333J/G. THEREFORE FOR 1 KG I.E 1000 G, WE NEED [333*1000] J =333000 J=333KJ

I HOPE YOU ARE ABLE TO UNDERSTAND MY EXPLANTION.

Answer 2

I will assume you mean ice that is already at 0 °C and not ice