Chapter 7, Problem 7.73P

Find the quanity of heat required to produce 79% dry steam at 8000 kpa from feedwater at 50 degrees celcius ?.

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1 kg of steam expands isentropically from 2.5 MPa & 300 Degrees Celsius to .95 MPa. Find the final quality and Wn, Ws.

A conduit connects two receptacle of different size. A valve is used at eachend which can be opened or closed. The first receptacle contains 300 litersof air at 4,200 kPa, 82C. The second receptacle contains air at 75kPa, 9C.Calculate the volume of the second receptacle if after the valve wasopened and the properties of the mixture were 2400kPa for the pressure,and 52C for the temperature.

With 3% moisture, 2.5 kg of steam has an enthalpy of 6600 kJ. It is heated at constant pressure to a final condition of 80 o Find (a) the pressure of the process, (b) the quantity of heat received by the steam, and (c) draw and use h-s diagram.

If 528 kJ of heat are added to 2.25 kg of helium at constant volume process when the initial temperature is 40 deg. C, find: the change in enthalpy in kJ 869.5 889.5 879.5

Find the total enthalpy of 1.4 kg of steam that is at 350 kPa with a 0.36 quality?