Energy required : 69834 J
Further explanation
The heat to change the phase can be formulated :
Q = mLf (melting/freezing)
Q = mLv (vaporization/condensation)
Lf=latent heat of fusion
Lv=latent heat of vaporization
The heat needed to raise the temperature
Q = m . c . Δt
30.9 g of water at 100.0 degrees C is converted to steam
Lv=latent heat of vaporization for water = 2260 J/g
Heat required (phase change water to steam at 100 C)
[tex]\tt Q=m.Lv\\\\Q=30.9\times 2260\\\\Q=69834~J[/tex]
