A metal has a latent heat of fusion of 2.32 × 10⁴ J/kg,a specific heat of 128 J/kg ∙ K,and a melting point of 228°C.A 30-g pellet of this metal at 16°C hits a solid wall and comes to a complete stop.What would the speed of the pellet have to be in order for it to melt completely when it hits the wall,assuming that all of its kinetic energy is transformed into thermal energy within the pellet?

Question

Quizplus · Accepted Answer

The kinetic energy required to melt the pellet is equal to the sum of the energy needed to raise its temperature to the melting point and the latent heat of fusion. Calculate the energy needed and equate it to the kinetic energy formula to find the speed.

A Metal Has a Latent Heat of Fusion of 2