Explanation Write the expression for the energy balance equation. E in − E out = Δ E system (I) Here, the total energy entering the system is E in , the total energy leaving the system is E out , and the change in the total energy of the system is Δ E system . Substitute Q in for E in , W b , o u t for E out , and Δ U for Δ E system in Equation (I). Q i n − W b , o u t = Δ U Q i n = m ( u 3 − u 1 ) + W b , o u t (II) Here, the mass of the piston cylinder device is m , the final specific internal energy is u 3 , the initial specific internal energy is u 1 , and the work done during the process is W b , o u t . Write the expression for the initial volume of the air. V 1 = m R T 1 P 1 (III) Here, the initial volume of the system is V 1 , mass of the air is m , gas constant is R , temperature at state 1 is T 1 , and pressure at state 1 is P 1 . Write the relation between the initial and final volume. V 3 = 2 V 1 (IV) Determine the final Temperature ( T 3 ) of hydrogen in the tank. P 1 V 1 T 1 = P 3 V 3 T 3 T 3 = P 3 V 3 P 1 V 1 T 1 (V) Here, pressure at state point 3 is P 3 . Determine the work done during the constant pressure process. W b , o u t = ∫ 2 3 P d ν = P ( ν 3 − ν 2 ) (VI) Here, the final pressure is P . Conclusion: From the Table (A-4 through A-6), obtain the value of initial specific volume, the specific internal energy at initial pressure of 250 kPa . ν 1 = ν g @ 250 kPa = 0.71873 m 3 / kg u 1 = u g @ 250 kPa = 2536.8 kJ / kg Substitute 3 kg for, 0.287 kPa ⋅ m 3 / kg ⋅ K for R , 27 ° C for T 1 and 200 kPa for P 1 in Equation (III) V 1 = 3 kg × ( 0.287 kPa ⋅ m 3 / kg ⋅ K ) × 27 ° C 200 kPa = 3 kg × ( 0

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ISBN: 9780100257054

Author: CENGEL

Publisher: YUZU

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It is generally related to thermal engineering which tells about the use, creation, conversion and transfer of heat energy between the systems. It is also considered that to transfer heat from one source to another, transfer of masses is also required. T…

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Chapter 4.5, Problem 75P

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The work done by the air and the amount the amount of heat transfer in the process

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Chapter 4.5, Problem 74P

Chapter 4.5, Problem 76P

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