Answered: Balloon planes are filled with 5,000…

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

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The pressure change during a particular reversible process is given by T = AP2 where A is a constant. A monatomic ideal gas is taken through this process from a temperature of 4T0 to 16T0. The sample of gas consists of n moles. (Hint: You must express the pressure in terms of volume using the equation for the process and the ideal gas law.) Compute the work done by the gas in terms of n, R, and T0 (and appropriate numerical constants) only. Compute the change in heat for the gas in terms of n, R, and T0 (and appropriate numerical constants) only. Compute the change in entropy for the gas in terms of n, R, and T0 (and appropriate numerical constants) only.
You have steam at 500°C with specific volume 0.62. Calculate its specific enthalpy in KJ/kg.
Nitrogen is isobarically expanded from 100 kPa and 600 K until the volume doubles in a closed piston-cylinder. Assume that specific heats are constant and evaluated at the average temperature. Hint: Nitrogen is an ideal gas.Determine the amount of heat transfer into the system, in kJ/kg? Calculate the change of enthalpy, in kJ/kg?Calculate the change of internal energy, in kJ/kg? Report your answer to the nearest whole number using rounding.

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Balloon planes are filled with 5,000 moles of helium. The initial helium state is 101.325 kPa and 298 K. As the aircraft increased its altitude, it decreased to 96.3 kPa and 288 K. Find changes in helium volume, internal energy, and enthalpy in this process. Helium is an ideal gas and has Cv=1.5 R.