Chapter 21, Problem 26PQ

A 25-g ice cube at 0.0°C is heated. After it first melts, the temperature increases to the boiling point of water (100.0°C), and the water then boils to form 25 g of water vapor at 100.0°C. How much energy in total is added to the ice/water? Which process (melting, increasing temperature, or boiling) requires the most energy? Water has a latent heat of vaporization of 2.256 × 10⁶ J/kg, a latent heat of fusion of 3.33 × 10⁵ J/kg, and specific heat of 4190 J/(kg · K).