Answer: To find the specific latent heat of fusion of element Y, we can use the formula Q = m × L, where Q is the heat energy, m is the mass, and L is the specific latent heat of fusion. We can rearrange this formula to get L = Q / m. Plugging in the given values, we get:
L = 405,000 J / 0.6 kg L = 675,000 J/kg
Therefore, the specific latent heat of fusion of element Y is 675,000 J/kg. This means that it takes 675,000 joules of energy to melt one kilogram of element Y at its melting point. You can learn more about the concept of latent heat of fusion and how to calculate it from the web search results I found for you.