The amount of energy needed to melt a solid, also known as the heat of fusion, is the specific amount of energy required to change a substance from its solid state to its liquid state at a constant temperature and pressure.
The amount of energy needed to melt a solid can be calculated using the formula Q=mL, where Q is the amount of energy in joules, m is the mass of the substance in grams, and L is the specific heat of fusion in joules/gram.
Yes, the amount of energy needed to melt a solid varies depending on the substance. Each substance has its own unique specific heat of fusion, which is determined by the strength of the intermolecular forces between its particles.
Pressure does not have a significant effect on the amount of energy needed to melt a solid. However, for substances with high vapor pressures, an increase in pressure can result in a slight decrease in the melting point, which can affect the amount of energy needed to melt the solid.
No, the amount of energy needed to melt a solid cannot be greater than its specific heat of fusion. This is because the specific heat of fusion is the maximum amount of energy required to melt a solid at a constant temperature and pressure. Any additional energy will result in a change in temperature rather than a change in state.