Which contains more heat,1 kg of water at 100∘C or 1 kg of steam at 100∘C? Give a reason for your answer.
1 kg of steam contains more heat than 1 kg of water because more heat is needed to convert water into steam. The heat needed to convert water to steam is the latent heat of vaporization. So the steam at 100∘C contains more heat due to the energy it received as latent heat of vaporization to change the state from water at 100∘C to steam at 100∘C.