Question 2 of 10Constants for waterHvap 40.65 kJ/molHf -285.83 kJ/molHfusion 6.03 kJ/molspecific heat 4.186 J/gCmolar mass 18.02 gHow much energy is released when 6.0 g of water is condensed from water vapor?A.6.0 g 1 mol/18.02 g 6.03 kJ/molB.6.0 g 1 mol/18.02 g 40.65 kJ/molC.6.0 g 1 mol/18.02 g (-285.83 kJ/mol)D.6.0 g 1 mol/18.02 g 4.186 kJ/molSUBMITarrow_backPREVIOUS
Question
Question 2 of 10Constants for waterHvap 40.65 kJ/molHf -285.83 kJ/molHfusion 6.03 kJ/molspecific heat 4.186 J/gCmolar mass 18.02 gHow much energy is released when 6.0 g of water is condensed from water vapor?A.6.0 g 1 mol/18.02 g 6.03 kJ/molB.6.0 g 1 mol/18.02 g 40.65 kJ/molC.6.0 g 1 mol/18.02 g (-285.83 kJ/mol)D.6.0 g 1 mol/18.02 g 4.186 kJ/molSUBMITarrow_backPREVIOUS
Solution
The energy released when water is condensed from water vapor is given by the heat of vaporization (Hvap).
First, we need to convert the mass of water to moles using the molar mass of water.
6.0 g * (1 mol / 18.02 g) = 0.333 mol
Then, we multiply the moles of water by the heat of vaporization to find the energy released.
0.333 mol * 40.65 kJ/mol = 13.55 kJ
However, because the water is condensing (going from a gas to a liquid), the energy is being released, so we take the negative of this value.
So, -13.55 kJ of energy is released when 6.0 g of water is condensed from water vapor.
Therefore, the correct answer is B. 6.0 g 1 mol/18.02 g 40.65 kJ/mol.
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