A steel casting (Ĉp = 0.12 kcal/kgK) weighing 40 kg and at a temperature of 500 ° C is quenched in 100 kg of oil (Ĉp=0.6 kcal/kgK) at 15 ° C. There are no heat losses, find (A)the entropy generated during the process (B) Lost work ? △Stotal=? kcal/K  W=? kcal

Q: During a steady flow process, the pressure of the working substance drops from 200 to 20 psia, the…

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Q: A cylinder-piston apparatus contains nitrogen initially at 20 bar, 107ºC and 0.3 m ^ 3. The piston…

A: Given: Initial condition of the nitrogen are: 20 bar, 107ºC and 0.3 m ^ 3 Final pressure of the…

Q: For the following process: Saturated liquid water, initially at 25°C contained inside a tank, is…

A: Three single phase zones (liquid, vapour, and supercritical fluid) are represented on the Tv…

Q: 20-lb aluminum bar, initially at T₂ = 210°F, is placed in a tank together with 190 lb of liquid…

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Q: A piston-cylinder device contains 2 kg of water which is initially a saturated liquid at 300 ∘ C. It…

A: The mass of liquid is.The initial temperature is Initially the water is saturated liquid.The…

Q: One-quarter Ibmol of oxygen gas (O2) undergoes a process from p1 = 20 lbf/in?, T1 = 500°R to p2 =…

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Q: 0.05 kg of a certain gas in a piston and cylinder is compressed reversibly until the pressure…

A: Given: Mass of the gas (m)=0.05kg Initial pressure of the gas P1=0.1025MPa Initial volume of the gas…

Q: 1 kg of steam in a piston / cylinder assembly is initially at 357.933 \ deg C and 2685.66 kPa. It is…

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Q: While the temperature remains constant at 38 degrees C, 2.5 kg of a certain ideal gas whose Cp =…

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Q: 3. 0.1 kg of Water is compressed in a piston cylinder assembly adiabatically. The water starts out…

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Q: A gas with specific volume v₁ = 1 m³/Kg and pressure p₁-6bar in a closed system undergoes a…

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Q: Saturated liquid water, initially at 25°C contained inside a tank, is then delivered by a pump at 5…

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Q: = 15°C. The substance A piston-cylinder assembly contains water that is initially at p1 = 2.7 bar…

A: Step 1: Data Given p1 = 2.7 bar, T1 = 150 C  = 288.15 Kp2 = 1.2 bar, T2 = 700 C = 343.15 K  Step 2:…

Q: In a quasi-static isobaric expansion, 540 J of work are done by the gas. The gas pressure is 0.90…

A: From the first law of thermodynamics - Q2-1 = W2-1 + ∆UQ2-1 = 540 + 70Q2-1 = 610 J

Q: 1.1 A certain fluid at 10 bar is contained in a cylinder behind a pis- ton, the initial volume being…

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Q: Krypton in a closed system is compressed adiabatically from 74 K and 1 bar to a final pressure of 24…

A: Given data  For polytropic process  T1=74K and P1=1bar And P2=24bar  Find the final temperature for…

Q: A 60-lb aluminum bar, initially at T, = 190°F, is placed in a tank together with 190 lb of liquid…

A: Given Data The mass of the aluminum bar is: ma=60 lb The initial temperature of the aluminum bar…

Q: A gas with specific volume v₁ = 1 m³/Kg and pressure p₁=1bar in a closed system undergoes a…

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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.