1. The problem statement, all variables and given/known data How much energy is required to change one-quarter of 8.0kg of water at 25 C into steam? The way I see it, the entirety of the 8.0kg of water must be brought from 25 C to 100 C, then only 2.0kg is changed to steam so... Specific heat capacity (of water) = 4200 J / kg C Latent heat of vaporization (of water) = 2.3 * 10^6 J/kg Q total = (8.0kg) (4200 J / kg C) (100-25) + (2.0kg) (2.3 * 10^6 J/kg) Q total = 7.12 * 10^6 J I'm not 100% sure if I'm doing this properly. Does this look correct?