Here's a breakdown of what that means:

* Specific Latent Heat of Fusion: The amount of energy required to change 1 gram of a substance from a solid to a liquid at its melting point, without changing its temperature.

* Mercury: A heavy, silvery-white liquid metal.

* kJ/mol: Kilojoules per mole. A mole is a unit of measurement that represents a specific number of particles (6.022 x 10²³).

* J/g: Joules per gram. This is a more practical unit for everyday applications.

It's important to note:

* The specific latent heat of fusion can vary slightly depending on the source and the pressure.

* The values provided above are generally accepted as accurate.

Let me know if you have any other questions!