of water could be vaporized if the energy of 915 kJ was used.
Further explanation:
Enthalpy of vaporization
It is the amount of energy that is required to convert a substance from its liquid state to a vapor or gaseous state. It is also known as the latent heat of vaporization or heat of evaporation. It is represented by .
The expression for the heat of vaporization is as follows:
…… (1)
Here,
q is the energy of the substance.
n is the number of moles of the substance.
is the heat of vaporization.
Rearrange equation (1) for n.
…… (2)
The amount of energy is 915 kJ.
The heat of vaporization of water is 40.7 kJ/mol.
Substitute these values in equation (2).
The formula to calculate the moles of a substance is as follows:
…… (3)
Rearrange equation (3) to calculate the mass of substance.
…… (4)
Substitute 22.48 mol for moles of substance and 18.01 g/mol for the molar mass of substance in equation (4) to calculate the mass of water.
The formula to calculate the density of water is as follows:
…… (5)
Rearrange equation (5) to calculate the volume of water.
…… (6)
Substitute 1 g/mL for the density of water and 404.86 g for the mass of water in equation (6).
The volume of water is to be converted into L. The conversion factor for this is,
So the volume of water can be calculated as follows:
Learn more:
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Answer details:
Grade: Senior School
Subject: Chemistry
Chapter: Thermodynamics
Keywords: density, enthalpy of vaporization, volume of water, 0.405 L, 404.86 g, 22.48 mol, heat of evaporation, q, n, mass of water.