How is latent heat (Eh) commonly expressed in terms of mass and specific latent heat?

Latent heat is a term used to describe the amount of heat energy required to change the state of a substance without changing its temperature. This process comes into play during phase changes, such as melting or boiling. The relationship between latent heat and the mass of a substance is captured by the equation:

Eh = ml

In this formula, Eh represents the latent heat absorbed or released (measured in joules), m represents the mass of the substance (measured in kilograms), and l represents the specific latent heat (measured in joules per kilogram). The specific latent heat is a property of the material and specifies how much energy is needed per kilogram for the phase change to occur.

Using this equation, you can see that the latent heat is directly proportional to both the mass of the substance and the specific latent heat. If you were to double the mass or the specific latent heat, the total latent heat would also double. This fundamental relationship highlights the significance of both mass and the material's properties in determining the energy needed for phase changes.

The other expressions do not correctly relate latent heat to mass and specific latent heat in the context of phase changes. Therefore, the expression Eh = ml accurately reflects the underlying physics of latent heat.