. Water with a mass of 1000kg leaves a hose at 20oC and is converted by the heat from the fire into steam at 300oC. List the steps needed in order to determine the amount of heat that is added to the water. For each step show the formula that must be used and replace the variables with the appropriate numbers. Also, state whether the heat for each step will be positive or negative. You do not need to complete the calculations. Specific heat of water = 4.2 kJ/kgoC, Latent heat of vaporization of water = 2260 kJ/kg, Specific heat of steam = 2.0 kJ/kgoC

If you have 300. grams of water at 100oC. How many kilojoules of heat are required to evaporate completely all the water? ΔHvap of water is 40.7 kJ/mole.

To determine the amount of heat that is added to the water, you need to consider different stages of the process. Here are the steps involved:

Step 1: Calculate the heat required to raise the temperature of the water from 20°C to 100°C (boiling point of water):
Formula: Q1 = mass × specific heat of water × ΔT1
Variables:
- mass = 1000 kg (given)
- specific heat of water = 4.2 kJ/kg°C (given)
- ΔT1 = (100°C - 20°C) = 80°C (temperature change)
Heat (Q1) will be positive since the water temperature is increasing.

Step 2: Calculate the heat required to convert the water at 100°C to steam at 100°C:
Formula: Q2 = mass × latent heat of vaporization of water
Variables:
- mass = 1000 kg (given)
- latent heat of vaporization of water = 2260 kJ/kg (given)
Heat (Q2) will be positive since the water is undergoing a phase change.

Step 3: Calculate the heat required to raise the temperature of the steam from 100°C to 300°C:
Formula: Q3 = mass × specific heat of steam × ΔT3
Variables:
- mass = 1000 kg (given)
- specific heat of steam = 2.0 kJ/kg°C (given)
- ΔT3 = (300°C - 100°C) = 200°C (temperature change)
Heat (Q3) will be positive since the steam temperature is increasing.

Step 4: Calculate the total heat added to the water:
Formula: Total Heat = Q1 + Q2 + Q3

Please note that the actual calculations for each step using the given values have not been completed in this response.