(2) Describe briefly why the following statements are wrong. (a) “Hot cup of coffee becoming cold spontaneously is an entropy-decreasing process. So the law of entropy increase can be violated." (b) “Air conditioners require bulky external unit, exhausting heat to outside. With the technology constantly advancing, external unit will be eliminated in the future."

Q: D. Steam operates in a Carnot engine between pressures 10000 kPa and 2.5 kPa. At 10000 kPa, steam is…

A:

Q: Define the exergy destruction, which is the wasted work potential during a process as a result of…

A: Exergy destruction is lost work potential which is also called as lost work.

Q: 4 2 A. Carnot cycle B. ideal heat engine cycle OC. Carnot refrigeration cycle O D. Reversed…

A: As we know that in the refrigeration Carnot cycle is considered as reversed Carnot cycle so that is…

Q: Air at 2.5 bar, 400 K is extracted from a main jet engine compressor for cabin cooling. The…

A:

Q: Sketch these thermodynamic process on a PV diagram

A: For a Carnot cycle Process A-B is an isothermal expansion  Process B-C is an adiabatic expansion…

Q: The working gas of a thermodynamic cycle is a diatomic gas (assume constant specific heats.) The gas…

A:

Q: An insulated, steady state piping system consists of flowing air that is combined from two pipes…

A:

Q: 8.6 Nozzle Flow of Air In a jet engine, hot combustion product (treat as air) enters the nozzle at…

A:

Q: The working gas of a thermodynamic cycle is a diatomic gas (assume constant specific heats.) The gas…

A: The objective of the question is to analyze a thermodynamic cycle involving a diatomic gas…

Q: 5. (Calculation questions, A cycle 1-2-3-4-1 is proposed, in which 1-2 is a reversible adiabatic…

A: Yes this cycle can be realised because, if out of two adiabatic curves atleast one is irreversible…

Q: 6. A refrigeration cycle operating between two reservoirs, receives energy Qc from a cold reservoir…

A:

Q: The working gas of a thermodynamic cycle is a diatomic gas (assume constant specific heats.) The gas…

A: The objective of the question is to analyze a thermodynamic cycle involving a diatomic gas…

Q: All equilibrium reversible processes have a total entropy to be equal to______

A:

Q: nd the rate of entropy production and determine if the cycle operates irreversibly, reverisbly, or…

A: ηcarnot=1-TLTH         =1-4001200ηcarnot=0.667=66.7%  a). Q˙H=600KW   ,   Q˙C=400KW   W˙NET =200KW…

Q: (e) Draw a Carnot power cycle and a Carnot refrigeration cycle for an ideal gas on a T-S diagram.…

A:

Q: A- For the cycle shown in the (P-V) diagram, a 0.1 kg of air is suffered from three process. Find…

A: Mass of the air, m=0.1 kg From the diagram Volume at 1 and 2, V1=V2=0.08 m3 Pressure at 1 and 3,…

Entropy

In physics, entropy means the amount of disorder or the degree of randomness associated with a thermodynamic system. The system is not self-organized when the entropy of the system is high. For instance, when a system is at an elevated temperature, its molecules are in random motion, vibrating and colliding with each other. During this scenario, the probability of finding a molecule at a particular place twice, is low. Under this circumstance, the system can be said to be in a high entropy.