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Frankenstein19
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Homework Statement
What factors affect enthalpy of fusion? Also, does structure affect enthalpy of fusion?
What are your thoughts on this so far?Frankenstein19 said:Homework Statement
What factors affect enthalpy of fusion? Also, does structure affect enthalpy of fusion?
The enthalpy of fusion, also known as heat of fusion, is the amount of energy required to change a substance from solid to liquid at its melting point, while keeping the temperature constant.
The main factors that affect the enthalpy of fusion are the type of substance and the pressure at which the fusion takes place. Other factors such as impurities, temperature, and molecular structure may also play a role.
Pressure affects the enthalpy of fusion because it determines the amount of space available for the molecules to move and interact with each other. Generally, an increase in pressure leads to a decrease in enthalpy of fusion, as the molecules are forced closer together and have a higher chance of forming bonds.
Yes, the enthalpy of fusion can be negative. This means that the substance releases energy when transitioning from solid to liquid, instead of requiring energy. This is often seen in substances with weak intermolecular forces, such as water.
The enthalpy of fusion can be measured using calorimetry, which involves measuring the change in temperature of a substance as it undergoes fusion. This change in temperature can then be used to calculate the enthalpy of fusion using the formula Q = m x ∆H, where Q is the heat absorbed, m is the mass of the substance, and ∆H is the enthalpy of fusion.