ME326_HW4_21Sept2011

# ME326_HW4_21Sept2011 - ME 326-Homework Assignment#4 Due 21...

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ME 326-Homework Assignment #4 Due: 21 Sept 2011 Topic: Ideal Gas and state models Problem #1: A rigid tank has a volume of 52.5 ft 3 and contains methane (CH 4 ) gas at a temperature of 50 °F and 2000 psia. For these conditions, a) estimate the mass of methane in the tank using the Ideal Gas Model, b) estimate the mass using generalized compressibility, c) assuming the result for part b is correct, what is the relative error if the Ideal Gas model were used to determine the mass in the tank? Problem #2: Air is contained in a rigid tank at a temperature of 0 °C. Heat is added to the system to that the specific internal energy of the air increases by 800 kJ/kg. Modeling the air as an Ideal Gas, determine the final temperature assuming a) constant specific heat at 0 °C, b) constant specific heat at T avg , c) 3 rd order polynomial expression for specific heat from Table 3s, d) property values from Table 5s. Problem #3:

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ME326_HW4_21Sept2011 - ME 326-Homework Assignment#4 Due 21...

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