A piston-cylinder device initially contains 0.3 m³ of nitrogen gas at 350 kPa and 35 ℃. An electric heater within the device is turned on and is allowed to pass a 240W for 6 minutes. Nitrogen expands at constant pressure, and a heat loss of 3000 J occurs during the process. Determine the final temperature of the nitrogen. (Average C_P for Nitrogen is 1.039 kJ/kgK and molecular weight of Nitrogen is 28.01 kg/kmol.)

A gas stream containing 3% A is passed through a packed column to remove 99% of A by absorption in water. The absorber will operate at 25 C and 1 atm, and the gas and liquid rates are to be 20 mole/h ft2 and 100 mole/h ft2 respectively. Mass transfer coefficient and equilibrium data are as follows:

y* = 3.1 x at 25 C

k_xa = 60 mol/h ft3 unit mol fraction

k_ya = 15 mol/h ft3 unit mol fraction

a)Evaluate Noy, Hoy, and ZT

b) Calculate ZT using Nox and Hox

(NB: Please don't copy paste the solution from google' web, because i dont know what equation did they use to compute for the unknown. Please help wiith complete equations, explanation for this problems and diagram. Thank You <3 )

The sodium potassium pump transports 5 ions for every molecule of ATP that is hydrolyzed: 3 Na+ out of the cell and 2 K+ into the cell. The pump maintains internal Na+ at 13 mM and external Na+ at 144 mM; it maintains internal K+ at 138 mM and external K+ at 9 mM. Assuming that the membrane potential is –66 mV (inside negative relative to outside), the temperature is 37 °C, and F is 23.1 kcal/V·mol, how much energy does it take to run the pump (i.e., how many kcal of energy are required per 5 mol of ions pumped)? Report your answer to the nearest tenth of a unit.

1.A stockpile of approximately 50 metric tons of plutonium exists in the United States as a result of disassembling warheads from the nuclear arms race. What is the likely fate of this plutonium? (Hint: Search for plutonium disposal. Try also including United States and DOE in your search string.)

a. Some propose that the plutonium be sent to local nuclear power plants to “burn” as fissionable fuel. What are the advantages and disadvantages of such a course of action?

b. Others propose that it be stored permanently in a repository. Again, list the advantages and disadvantages.

A fuel consists of 75% mol methane 25% mole of ethane enters an oven with 80%
excess air at 30 degrees Celsius. If 8 x 10 ^ 5 kJ per kg mol of fuel is transferred as heat to the boiler tubes, at what temperatures do the combustion gases from the furnace come out? Assume combustion
complete

* The steps of the solution of the thermodynamics book edition 7 are not accepted.

* Do the exercise step by step please.

* With clear formulas to know where each number comes from (result).

what is a reversible versus irreversible path and why is a reversible path useful while being physically impossible. what makes a reversible path impossible?

For eutectoid steel:

b) Sketch the thermal history (i.e., path) and calculate the final microstructure when the steel has the following heat treatment sequence : i) instantaneously quenched from 850 C to 300 C, ii) held at 300 C for 1 hour, and iii) air cool to 20 C. (Materials science)

A packed bed reactor is filled with catalyst material with a diameter of 1.5 mm. The length of the reactor is 80 cm and the catalyst has a porosity of 0.45. The superficial mass velocity of the inlet gas is 7.5 kg/m2-s with a viscosity of 1.55x10-5 kg/m-s and a density of 2.8 kg/m3. The inlet pressure is 300 kPa. Find the pressure, P, at the end (the exit) of the PBR.

A tank containing air at atmospheric pressure must be purged with pure nitrogen until the oxygen concentration is 5 ppm. The tank can withstand a vacuum, so vacuum purging is considered. The vacuum line used produces an absolute pressure of 6 mmHg. How many vacuum cycles are necessary?

A high grade fuel oil which consists of only hydrocarbon, CxHy is burnt in a combustion chamber at 25 °C. The standard heat of combustion is -43,515 J/g with CO2 (g) and H2O (l) as products. The temperature of the fuel and air entering the combustion chamber is 25 °C. The air is assumed dry. The flue gases leave at 300 °C and their average composition is 11.2 % CO2, 0.4 % CO, 6.2 % O2 and 82.2 % N2 based on dry basis.
Solve the following problems using a basis of 100 mol dry flue gases.

(a) Determine the molecular composition and mass of the fuel oil, CxHy.

(b) Determine the heat of combustion that is absorbed/released from the combustion chamber.

Steam at 4 MPa and 350°C is expanded in an adiabatic turbine to 120 kPa. What is the isentropic efficiency of this turbine if the steam is exhausted as a saturated vapor?

A CMFR is operating at steady state with a second order decay reaction of rate constant k2=0.5 L/mg/d. It is exactly meeting its goal of 99.9% removal efficiency and the allowed maximum effluent concentration of 0.05 mg/L. The volumetric flow rate is 450 m3Id.

a. What is the influent concentration in mg/L?

b. What is the reactor volume in m3? What volume would be required if the removal efficiency goal were 99.0%? c(5). If the CMFR is replaced with a PFR, what reactor volume is needed (in m3)?

In microfiltration what is Dependence of the TMP on the permeate flow, liquid viscosity, membrane resistance, and cake resistance.

With the aid of a diagram explain how a thermal desorption-gas chromatography-mass spectrometer functions for the analysis of VOCs.