During a laboratory experiment, a 25.0 g ice block is placed inside a glass vacuum container. The container is sealed and evacuated to create a vacuum. The initial temperature of the ice block is -15 °C. Determine the amount of heat transferred to the ice cube that causes the block to melt and completely turn into steam at 120 °C.

A highly energetic object with a mass of 2 kg passes through a horizontal water pipeline containing water at 30 °C. The object's initial speed is 3 km/s, and it loses all its kinetic energy through viscous drag in the water. If 25% of the lost kinetic energy goes to boiling the pipeline water while the rest is lost as turbulence, how much water will evaporate due to viscous drag?

On a hot summer day, a construction worker is laboring outdoors, and their body produces sweat to maintain a safe temperature. The evaporation of sweat absorbs heat, and at 35°C, the heat of vaporization for water is 40.7 × 10⁵ J/kg. The worker's body produces 28 grams of sweat every minute as a result of intense physical activity. Determine the rate (in J/s) at which the worker's body can dissipate heat through sweat evaporation if all the sweat evaporates instead of dripping off. Hint: Treat sweat as equivalent to water.