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What is involved in such a process? Compare the heating values of the gas products with those of the original coal. Discuss the merits of this conversion.
Describe the vertical temperature strata for each type of precipitation and how such a sequence of precipitation might occur.
Find the required equivalence ratio in case A and the amount of argon, x, for a stoichiometric ratio in case B.
Products at one point are brought to 1300 R and used in a heat exchanger, where they are cooled to 77 F. Find the specific heat transfer in the heat exchanger.
What is the T after the compressor, assuming a simple adiabatic compression from 100 kPa to 1.2 MPa?
Find the heat transfer, Q1 (kJ/kmol fuel). Find the enthalpy of formation of the fuel as vapor. Find the specific turbine work output, W (kJ/kmol fuel).
Find the mixture temperature before combustion and the work, assuming an adiabatic turbine.
Determine the temperature of the products exiting the chamber. Assume that only H2O, H2, and N2 are present.
Determine the enthalpy of combustion per kilogram of magnesium. Estimate the adiabatic flame temperature when magnesium is burned with theoretical oxygen.
Determine the percentage of theoretical air used in the process and the dew-point temperature of the products.
Find the final pressure, the heat transfer per kmol fuel, and the total entropy generated per kmol fuel in the process.
There is enough excess air to give a flame temperature of 1800 K. What are the percent theoretical air and the irreversibility in the process?
Calculate x if half of the H2O in the products is condensed. Calculate the absolute entropy of the products at the exit conditions.
The gas-turbine cycle in Problem 10.28 has qH = 960 kJ/kg air added by combustion. Assume the fuel is methane gas. Find the air-fuel ratio on a mass basis.
Find the work and heat transfer per kilogram of fuel mixture and also the exhaust temperature.
Find the dew point of the products and the mass of water condensed per kilogram of fuel mixture.
How does the dew point change as the equivalence ratio goes from 0.9 to 1 to 1.1? Why does combustion contribute to global warming?
Why are products measured on a dry basis? What is the dew point of hydrogen burned with stoichiometric pure oxygen? With air?
What makes the fuel cell attractive from a power-generating point of view? Is mass conserved in combustion? Is the number of moles constant?
How is a fuel enthalpy of combustion connected to its enthalpy of formation? What are the higher and lower heating values HHV, LHV of n-butane?
Make a list of design specifications for these bottles and give characteristic sizes and the amount of propane they can hold.
It is desired to design a portable breathing system for an average-sized adult. Determine the size of the system container and the heat exchanger.
Write a program to express the fluid density as a function of reduced temperature and pressure in the region of 1.0 = Tr = 1.2 in reduced temperature.
Write a program to obtain a plot of pressure versus specific volume at various temperatures as predicted by the van der Waals EOS.
Pentene, C5H10, is burned with pure O2 in a steady-flow process. The products at one point are brought. Find the specific heat transfer in the heat exchanger.