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 solve these problems, you can use the properties of saturated steam to determine the dryness and calculate the quantity of heat required.

Let's start with question 1:

1. The total enthalpy of the steam is given as 34191.510 kJ.
2. Look up the specific enthalpy of saturated steam at 2250.000 kPa in your chart. Let's call this value Hs.
3. Calculate the specific enthalpy of the mixture, Hm, using the formula:
Hm = (1 - x) * Hg + x * Hf
Where x is the dryness (which we need to find), Hg is the specific enthalpy of dry saturated steam, and Hf is the specific enthalpy of the liquid water.
4. Rearrange the formula to solve for x and substitute the given values:
x = (Hm - Hf) / (Hg - Hf)
5. Calculate the dryness, x, using the values from your chart and the specific enthalpy of the mixture from the given data.

Now, let's move on to question 2:

1. The initial temperature of the water is given as 80.000 degrees Celsius.
2. Look up the specific enthalpy of water at this temperature in your chart. Let's call this value Hw0.
3. Look up the specific enthalpy of saturated steam at 2250.000 kPa in your chart. Let's call this value Hs.
4. Calculate the quantity of heat required to raise the water to saturated steam at 2250.000 kPa using the formula:
Q = m * (Hs - Hw0)
Where Q is the quantity of heat required, m is the mass of water, and Hs and Hw0 are specific enthalpy values from your chart.
5. Substitute the given values and calculate the quantity of heat required, Q.

Remember to use the appropriate units for each value, and check your calculations to ensure accuracy.

I hope this helps! Let me know if you have any further questions.