Explanation Express the mass of the egg. m = ρ ν = ρ [ π D 3 6 ] (I) Here, diameter is D , density is ρ and volume is ν . Express the energy balance by taking the egg as the system which is a closed system. E in − E out = Δ E system Q in = Δ U egg = m ( u 2 − u 1 ) = m c p ( T 2 − T 1 ) (II) Here, the total energy entering the system is E in , the total energy leaving the system is E out , the change in the total energy of the system is Δ E system , net internal energy of egg is Δ U egg , heat transfer is Q in , initial and final specific internal energy is u 1 and u 2 respectively, specific heat at constant pressure is c p and initial and final temperature is T 1 and T 2 respectively. Express the change in entropy of system. Δ S system = m ( s 2 − s 1 ) = m c p ln T 2 T 1 (III) Here, initial and final specific entropy is s 1 and s 2 respectively, specific heat at constant pressure is c p and initial and final temperature is T 1 and T 2 respectively. Express the entropy generation by taking entropy balance on an extended system that includes the egg and its immediate surroundings. S in − S out + S gen = Δ S system Q in T 0 + S gen = Δ S system S gen = − Q in T 0 + Δ S system (IV) Here, net entropy transfer by heat and mass is S in − S out , entropy generation is S gen , change in entropy of system is Δ S system and surrounding temperature is T 0 . Express the amount of exergy destruction associated with the heat transfer process. X destroyed = T 0 S gen (V) Here, entropy generation is S gen . Conclusion: Substitute 1020 kg / m 3 for ρ and 5 .5 cm for D in Equation (I). m = ( 1020 kg / m 3 ) [ π ( 5 .5 cm ) 3 6 ] = ( 1020 kg / m 3 ) [ π { ( 5 .5 cm ) ( m / 100 cm ) } 3 6 ] = ( 1020 kg / m 3 ) [ π ( 0.055 m ) 3 6 ] = 0.08886 kg Substitute 3 .32 kJ / kg ⋅ °C for c p , 0

8th Edition

ISBN: 9781307434316

Author: CENGEL

Publisher: INTER MCG

See similar textbooks

Videos

Question

Chapter 8.8, Problem 45P

To determine

The heat transferred to the egg and the amount of exergy destruction associated with the heat transfer process.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Chapter 8.8, Problem 44P

Chapter 8.8, Problem 46P

Students have asked these similar questions

For some viscoelastic polymers that are subjected to stress relaxation tests, the stress decays with time according to a(t) = a(0) exp(-4) (15.10) where σ(t) and o(0) represent the time-dependent and initial (i.e., time = 0) stresses, respectively, and t and T denote elapsed time and the relaxation time, respectively; T is a time-independent constant characteristic of the material. A specimen of a viscoelastic polymer whose stress relaxation obeys Equation 15.10 was suddenly pulled in tension to a measured strain of 0.5; the stress necessary to maintain this constant strain was measured as a function of time. Determine E (10) for this material if the initial stress level was 3.5 MPa (500 psi), which dropped to 0.5 MPa (70 psi) after 30 s.

For the flows in Examples 11.1 and 11.2, calculate the magnitudes of the Δ V2 / 2 terms omitted in B.E., and compare these with the magnitude of the ℱ terms.

Calculate ℛP.M. in Example 11.2.

Chapter 8 Solutions

THERMODYNAMICS(SI UNITS,INTL.ED)EBOOK>I

Ch. 8.8 - What final state will maximize the work output of...Ch. 8.8 - Is the exergy of a system different in different...Ch. 8.8 - How does useful work differ from actual work? For...Ch. 8.8 - Prob. 4P Ch. 8.8 - Consider two geothermal wells whose energy...Ch. 8.8 - Consider two systems that are at the same pressure...Ch. 8.8 - Prob. 7P Ch. 8.8 - Does a power plant that has a higher thermal...Ch. 8.8 - Prob. 9P Ch. 8.8 - 8–10C Can a process for which the reversible work...

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.