The specific internal energy of helium at 300K and 1 atm. is 3800 J/mol. The specific molar volume at the same temperature and pressure is 24.63 L/mol. Calculate the rate of enthalpy of helium at this temperature and pressure with a molar flow rate of 500 kmol/h a. 9.71*10^9 J/h Ob. 2.21*10^7 J/h Oc. 1.21*10^6 J/h Od. 3.14*10^9 J/h

The specific internal energy of helium at 300K and 1 atm. is 3800 J/mol. The specific molar volume at the same temperature and pressure is 24.63 L/mol. Calculate the rate of enthalpy of helium at this temperature and pressure with a molar flow rate of 500 kmol/h a. 9.7110^9 J/h Ob. 2.2110^7 J/h Oc. 1.2110^6 J/h Od. 3.1410^9 J/h

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

What is the enthalpy of steam at 155 deg C? Find the specific enthalpy of superheated steam at 2 atm and 900°C.
Q6: In a vessel of volume Im there are 2 g of molecular H2, 6 g of molecułar Oz and 30 g of N2. What are the mole fractions, mass fraction and concentrations of the hydrogen, oxygen and nitrogen?
#9
An air-conditioning system made up of a compressor and heat exchanger is shown in the figure below. This system is operating at steady-state with air flowing through the heat exchanger while the refrigerant first flows through a compressor before entering the heat exchanger. The refrigerant and air do not mix in the heat exchanger. Two control volumes are defined in the figure and both of these control volumes are to be used to answer the questions from this problem. Rotating Shaft 3 Compressor Refrigerant 12 I Control volume B wwwwwww wwwww Heat Exchanger 1 1 I 5 Air Control _' volume A The air enters the heat exchanger (inlet marked 1 in the figure) at a temperature of -13 °C, volumetric flow rate of 0.03 m³/min, and pressure of 101 kPa. Upon exiting the heat exchanger, the air is at a temperature of 42 °C (outlet marked 2 in the figure). The air can be modeled as an ideal gas with gas constant of 287 J/kg.K. The refrigerant enters the compressor (inlet marked 3 in the figure) at a…
Solve it pls.
Problem 2: Entropy changes in free expansion and mixing. A. An isolated box has a partition dividing it into two equal parts, each with a volume V. Initially there are a total of N gas molecules all in the right-hand partition of the box. An opening is made on the partition. 1. What property (N, U, etc.) of the gas is changing as the gas expands into the left partition? V >. N. 2. Calculate, in terms of N and V only, the change in volumetric entropy ASvol Sf-S of the gas after it expands to fill both partitions. 3. Assume that each molecule has f degrees of freedom and that each begins with q energy blocks. What is the change in the energetic entropy, in terms of N and q? What is the total change in entropy of the gas? 4. Assume that the expanding gas is mol of CO2, each molecule with q = 12 energy blocks. Find the change in entropy of the gas, in J/K, after it expands. P.1
What is the relative amount of each alpha for a 40% wt% Sn-60% Pb at 150 degrees. Express your answer as a percentage (%) T(°C) 300+ 200+ 100+ Answer: 0 α L+a 18.3 20 Pb-Sn system L (liquid) 183°C 61.9 a + ß 60 C, wt% Sn 7+BB 97.8 80 100
2. Two gaseous streams enter a combined tube in a steady flow manner and leave as a single mixture Gas A at Tube A Gas B at Tube B A= 400 cm? V= 150 m/s V=0.6 m³/kg A= 250 cm? m= 455kg/min p= 2kg/m³. Data at exit: V= 100 m/s v=0.55 m/kg Find the following: a. Speed of gas at tube B b. Mass flow rate at exitp
18. Air (N, = 77%, O, = 23% by weight) at 20°C and 10 bar is contained in a vessel of capacity of 0.5 m³. Some quantíty of carbon dioxide is forced into the vessel so that the temperature remains at 20°C but the pressure rises to 15 bar. Find the masses of oxygen, nitrogen and carbon dioxide in the cylinder. The universal gas constant is 8.3143 kJ/kg K. [Ans. 1.35 kg, 4.54 kg, 4.51 kg)
what is the enthalpy of water at a pressure of 1000 kPa and a temperature of 50 oC, in kJ/kg * 632.18 1085.7 2745.9 none of the given anwers 209.34 2113.8 With all explanation please
3. Mass Transfer from a Pipe Wall. Air at 52.6 °C and 1 atm abs pressure passes through a pipe with naphthalene lining. The pipe's diameter in 25 mm. The vapor pressure of naphthalene at 52.6 °C is 1.0 mm Hg. The diffusivity in air of naphthalene at 0 °C is 5.16x106 m?/s. For a 0.20 m section of a pipe that is lined with naphthalene, calculate the exiting concentration if the entering air carries 0.001 kgmol/m of naphthalene and has a velocity of 0.30 m/s. A.3-3 Physical Properties of Air at 101.325 kPa (1 Atm Abs), SI Units Ax 105 (Pa s, or (K) (kg/m) (kJ/kg K) kg/m s) (W{m K) N, (1/K) Bx 10 9Bp 1 (1/K -m) k (°C) - 17.8 255.4 1.379 2.79 x 10% 2.04 x 108 1.72 x 10 1.12 x 10 0.02925 0.702 2.95 0.775 x 10 0.03115 0.694 2.74 0.534 x 108 0.03323 0.692 2.54 0.386 x 10* 0.03531 0.689 2.38 0.289 x 108 0.03721 0.687 2.21 0.214 x 108 0.03894 0.686 2.09 0.168 x 10* 0.04084 0.684 1.98 0.130 x 10 0.04258 0.680 1.87 0.104 x 108 1.62 0.02250 0.720 3.92 0.02423 0.715 3.65 1.0048 273.2 1.293 1.0048…
In a power plant operating with water and steam, the following measurements and observations were done at various stages along the system. the pressure is 150 kPa and the enthalpy, h is 1580.115 (kJ/kg) For this case, the specific vvolume is most likely: 0.001070 2.01302 1.1594 0.5802 0.001053