Use the following to answer question:
-Heat is added to a substance at a constant rate.The substance starts as a solid and is melted; the liquid is heated and vaporized; finally,the vapor is heated.This process is shown in the graph.The latent heat of fusion can be found by
A)multiplying the length of B (in seconds)by the rate at which heat is added,and dividing by the mass of the substance.
B)multiplying the length of D (in seconds)by the rate at which heat is added,and dividing by the mass of the substance.
C)multiplying the slope of A by the rate at which heat is added,and dividing by the mass of the substance.
D)multiplying the slope of C by the rate at which heat is added,and dividing by the mass of the substance.
E)multiplying the slope of E by the rate at which heat is added,and dividing by the mass of the substance.

Question

Use the following to answer question: 
-Heat is added to a substance at a constant rate.The substance starts as a solid and is melted; the liquid is heated and vaporized; finally,the vapor is heated.This process is shown in the graph.The latent heat of fusion can be found by
A)multiplying the length of B (in seconds)by the rate at which heat is added,and dividing by the mass of the substance. 
B)multiplying the length of D (in seconds)by the rate at which heat is added,and dividing by the mass of the substance. 
C)multiplying the slope of A by the rate at which heat is added,and dividing by the mass of the substance. 
D)multiplying the slope of C by the rate at which heat is added,and dividing by the mass of the substance. 
E)multiplying the slope of E by the rate at which heat is added,and dividing by the mass of the substance.

Quizplus · Accepted Answer

The latent heat of fusion refers to the heat required to change a substance from solid to liquid at its melting point without changing its temperature. This process occurs during phase B in the described graph, where heat is added but the temperature remains constant as the substance melts. Therefore, to find the latent heat of fusion, one would multiply the duration of this phase (length of B in seconds) by the rate at which heat is added, and then divide by the mass of the substance. This calculation gives the amount of heat required per unit mass to melt the substance, which is the definition of latent heat of fusion.

Use the Following to Answer Question