The density of water @ 100oC (boiling point) is about 0.958 g/ml. First we need to convert the 155 ml to mass by multiply by the density.
155 ml * (0.958 g/ml) = 148.49 grams
Next convert the grams to moles by dividing by the molecular weight of water, which is 18 g/mol:
148.49 grams /(18 g/mol) = 8.25 mol of H2O
Finally multiply the moles of water by the heat of vaporization (Hvap) to get the final answer:
8.25 mol * (40.7 kJ/mol) = 335.775 kJ
7.9
19.7 kJ
2.23 kj
The energy in kilojoule cannot be converted to the power in watts. The time is missing. But you can convert kilojoules to kilowatthours (kWh). Scroll down to related links and look at "Energy Converter".
Kilojoules (kJ) is unit of energy, not a compound.
The energy required to completely separate the molecules in a liquid and convert them to a gas (boiling), is greater than the energy needed to completely separate the molecules in a solid and convert them to a liquid (melting).
Energy is required in the melting process because high is needed to melt something
The required energy must be higher than the bond energy.
Kilojoules.
Melting requires energy input or absorption because liquid water has more energy than solid water.
energy is measured in joules and kilojoules
convection and radiation