1. The total enthalpy of 15.000kg of steam at 2250.000kPa is 34191.510kJ. Determine the dryness of the steam.

ANS = %

2. Determine the quantity of heat required, to raise 11.100kg of water at 80.000 degrees Celsius, to saturated steam at 2250.000kPa and 71.400% dry.
ANS = kJ

Not sure where to start. I need a little help please. I do have a chart with the properties of saturated steam. Thank you.

To determine the dryness of steam and the heat required, we can use the properties of saturated steam from the chart you have. Here's how you can solve these problems:

1. Determine the dryness of the steam:
First, find the enthalpy of saturated liquid (hL) and the enthalpy of saturated vapor (hV) at 2250.000kPa from the chart.
Next, calculate the enthalpy of the mixture using the equation:
h = hL + x(hV - hL)
where x is the dryness fraction of the steam. Rearrange the equation to solve for x:
x = (h - hL) / (hV - hL)
Substitute the given enthalpy (h) and the values from the chart into the equation to find the dryness in percentage (%).

2. Determine the quantity of heat required:
First, find the enthalpy of saturated liquid (hL) and the enthalpy of saturated vapor (hV) at the specified pressure (2250.000kPa) from the chart.
Next, calculate the enthalpy difference between the final state (saturated steam) and the initial state (water at 80.000 degrees Celsius) using the equation:
Δh = hV - h_initial
Multiply the mass of water (11.100kg) by the specific heat capacity of water (4.186kJ/kg°C) to calculate the heat required to raise the water to the boiling point.
Finally, calculate the total heat required using the equation:
Q = Q_initial + Δh
where Q_initial is the heat required to raise the temperature of water and Δh is the heat required to convert the water to saturated steam.
Substitute the values into the equation to find the heat required in kJ.

By following these steps, you can find both the dryness of the steam and the quantity of heat required. Make sure to consult the chart for accurate values of enthalpy at the given pressure.