How much thermal energy is required to boil 2.00 kg of water at 100.0C into steam at 125C? The latent heat of vaporization of water is and the specific heat of steam is .

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Bryllant BaluyutLv10

4 Nov 2020

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A 25g ice cube at 0.0C is heated. After it first melts the temperature increases to the boiling point of water (100.0C) and the water then boils to form 25g of water vapour at 100.0C.

a) How much energy in total is added to the ice/water?

b) Which process (melting, increased temperature or boiling) requires the most energy? Water has a latent heat of fusion of 3.33x10⁵J/kg, latent heat of vaporisation of 2.256x10⁶J/kg and specific heat of 4190 J/(kg.K)

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How much thermal energy is required to take a 42.0 g block of iceat -12 degrees C and heat it to steam at 131 degress C?
Specific heat (ice) = 2.06 J/g degrees C
Specific heat (water) = 4.184 J/g degrees C
Specific heat (steam) = 1.996 J/g degrees C
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The latent heat for the water/steam transition is 2256 kJ/kg, to convert 1 kg of water into steam requires 2256 kJ. What is the latent heat per molecule of H₂O? Express your answer in Joules and in eV.