The amount of energy released when freezes is .
Further explanation:
Heat of fusion measures the amount of energy needed to heat given mass of a solid to change its state into liquid. Also, it represents the amount of energy given up when a given mass of liquid solidifies.
When a substance converts from its phase from solid to liquid, the change in enthalpy is positive, and if the substance transforms from liquid state to solid state then the change in enthalpy is negative.
The expression to relate the energy released and heat of solidification is as follows:
Given mass of is 2.65 kg.
The conversion factor to convert mass in (g) from (kg) is written as follows:
So, 2.65 kg of mass is converted into (g) as follows:
Molar mass of is 74.12 g/mol.
The moles of can be calculated as follows:
The heat of fusion for diethyl etheris 7.27 kJ/mol and therefore the heat of solidification for diethyl etheris -7.27 kJ/mol.
The formula to calculate the amount of energy released is as follows:
…… (1)
Substitute 35.752 mol for number of moles and -7.27 kJ/mol for in the equation (1).
Therefore, the amount of energy released is .
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Answer details:
Grade: Senior School
Subject: Chemistry
Chapter: Thermodynamics
Keywords: Heat of fusion, number of moles, enthalpy, enthalpy change, released, absorbed, 259.91 kJ, 7.27kJ/mol, and 35.752 mol.