A piston and cylinder device (closed system) contain 2.25 mol of an ideal gas which
is compressed irreversibly at constant temperature from 423 K and 200 kPa to 8 bar.
The irreversible work applied for the compression is 15 % larger than the reversible
work for the same process. Determine the entropy change of the gas, the
surroundings and the total entropy change if the heat is rejected from the gas to
surroundings maintained at 25 oC.

The volumetric analysis of a certain fuel is given as
C2H6 22.6%
CH4 73.6%
CO2 2.4%
N2 1.4%
For 100 moles and the combustion ofair is dry and in 25% excess
Calculate
1) The molecular weight of the combustion products
2) The total gas volume for complete combustion at 260oC, 1 bar
3) The dry flue gas analysis based on CO2, O2 and N2.

Q4 / A thick walled hollow cylinder having outside and inside radii of (90, and r) respectively, is subjected to an external pressure of (8000 bar). Find internal radius and the stresses at inner and outer surfaces. E=200GPa

Explain three stages of annealing of metallic materials by sketching their microstructures. Why annealing is used? EXPLAIN.

(a) Explain why XRD (X-Ray Diffraction) and TEM (Transmission Electron Microscopy) techniques are suitable in examining the unit cells and crystal structures of solids. (b) Calculate the expected diffraction angle (θ) for the first order reflection from the (310) planes of BCC chromium (Cr) when a monochromatic X-ray radiation of wavelength (λ) 0.757 Ao is used.

write a Fortran 77 language code for the vortex tube used in mining with its exergy and anergy analysis using r407c refrigerant

A gaseous fuel mixture of 60% propane (C3H8) and 40% butane (C4H10) is an adiabatic The combustion chamber is fully burned with stoichiometric amount of air. Inputs 1 atm According to the pressure and 25 ℃ temperature entering the combustion chamber and the products exit at 1 atm pressure,

a) Write the combustion equation.

b) Air-fuel ratio,

c) Dew point temperature of the products,

d) Calculate the outlet temperature of the products.

(please explain step by step)

There are 5000 CFM of outdoor air with a temp of 40F 35Fwb heated and humidified under steady-flow conditions to a final temp of 70F and 40%RH a)find the mass of water vapor added to each pound mass of dry air b) if the water is supplied at 50F how much heat in Btu/min.

Please answer fast

Determine the properties of moist air in a region where tdb=80F,twb=70F and barometer reading of 750 mmHg. Compute (a) dew point temperature (b) percent relative humidity (c)partial pressure of dry air (d) specific humidity (e) enthalpy (f) specific volume of moist air.

You are the manager of a healthcare facility that is considering different payment options for buying supplies for your facility. The annual charges for these supplies is $10,000 and the vendor is offering you three payment options to consider.

option 1: 3% discount if you make the full payment in 30 days.

option 2: quarterly payments at the beginning of each quarter with a service charge of $100 per quarter.

option 3: monthly payments at the beginning of each month with a service charge of 3% for each monthly payment.

Q1: Which of these three options provides the best value for money? Why?

Q2: Payments for these supplies are made from your bank account which has a current balance of $30,000 and earns monthly interest of 0.2%.

a. Which of these three options now provides the best value for money?

b. At what interest rate would you be indifferent between Options 1 and 2?

c. At what interest rate would you be indifferent between Options 2 and 3?

d. Consider the ending balances under each of these three options for interest rate ranging from 0.0% to 2.0%. Develop data tables to compute the ending balances for this range of interest (consider interest increments of 0.2%). Depict your results in a line graph.

Assuming standard atmospheric pressure and tdb=25 C and 90% RH. Compute (a) dew point temperature (b) specific humidity (c) enthalpy (d) wet bulb temperature

Joining dissimilar metal in arc welding is a difficult task. Explain why?

There are 5000 CFM of outdoor air with a temp of 40F 35Fwb heated and humidified under steady-flow conditions to a final temp of 70F and 40%RH a)find the mass of water vapor added to each pound mass of dry air b) if the water is supplied at 50F how much heat in Btu/min.

An ACME double-threaded power screw has 45 mm major diameter, a pitch of 5 mm and thread angle 2α=29°. A vertical load on the screw reaches a maximum of 8.5 kN. The coefficients of friction are 0.05 for the thread and 0.1 for the collar. The frictional diameter of the collar is 65 mm. a) Find the efficiency of the power screw. b) Is this power screw self-locking? Explain why