When a wet cloth is hung up in a hot wind in the desert, it is cooled by evaporation to a temperature that may be 20 C or so below that of the air. Discuss this process in light of the second law of thermodynamics.

Q: Can improved engineering and materials be employed in heat engines to reduce heat transfer into the…

A: Heat engine works in a cycle. Second law of thermodynamics implies that no system can entirely…

Q: How a baby form in a mother's womb does this violate the second law of thermodynamics?

A: The second law of thermodynamics establishes the concept of entropy as a physical property of a…

Q: Which law of thermodynamics would be violated if heat were tospontaneously flow between two objects…

A: Second law

Q: When is the 1st law of thermodynamics AEth = Q+W valid? Always Only when the system is connected to…

A: First law of thermodynamics is the expression for the statement that energy can not be created not…

Q: 7. Write the First Law of Thermo- dynamics in terms of changes in specific volume and changes in…

A: To write: The first law of thermodynamics in terms of changes in specific volume and changed in…

Q: (a) How much food energy (in kcal) will a man metabolize in the process of doing 36.7 kJ of work…

A:

Q: Compute the internal energy of a 10-mol sample of triatomic gas at 300 K.

A: For ideal gas internal energy is given by  U =f2nRT

Q: 5 kg person cann- he rides a bike a duces energy at a verted to heat. TR

A: Energy produced by his body(w)=450WSo in 1hour the produced energy will be(E)=450×3600=1620000JThe…

Q: Consider an adiabatic humidification system shown below. The humidifying efficiency is E = 0.8, the…

A: In this question we use :                                   Vca=mcaRTcaPcaR = gas…

Q: Carnot refrigerator extracts heat from a freezer at -5.00°C and exhausts it at 25°C. How much work…

A: Given T1 = 25 0 C = 25+273 = 298 K T2 = 273 -5 = 268 K Heat extracted Q2 = 1 J

Q: True or false? The third law of thermodynamics says that the lowest temperature is -1000 oC.

A: The third law of thermodynamics states that as the temperature of a system approaches absolute zero…

Q: A nuclear power plant operates at 61 % of its maximum theoretical (Carnot) efficiency between…

A: The source temperature is 650 °C The sink temperature is 350 °C The efficiency of the power plant is…

Q: Could you warm a kitchen by leaving the door of a hot oven open? Explain.

A: In the hot oven, the coil of the oven heated, which heats the air inside the oven. The same process…

Q: In exercising, a weight lifter loses 0.111 kg of water through evaporation, the heat required to…

A:

Q: GIve one ecample of each type of ideal process in thermodynamics.

A: Solution

Q: Experiment 5: Human energy efficiency 2 a) A typical 2 oz chocolate chip cookie contains 260 food…

A: (a) Given,One 2 oz cookies contains 260 calories. then,Two 2 oz cookies contains =2×260=520…

Q: (a) When the steam engine is running between 120°C and 30°C, how many Js of calories are there in…

A: Given data

Q: If the plant operates at 50.0% of its maximum efficiency and its power output is 1.23 × 108 W, at…

A: The given data are: TH=540 KTL=313 KQH=1.23×108 W Here, TH is the higher temperature, TL is the…

Q: Give limitation of first law of thermodynamics ?

A: The limitations of first law of thermodynamics is given below.The first law of thermodynamics do not…

Q: According to the first law of thermodynamics, under what conditions would it be possible for a…

A: Yes. The internal energy of the system will not change if it performs the same amount of work as the…

Q: It is important for the body to be able to cool itself even during moderate exercise. Suppose a 70kg…

A: Given data M=70 kgt=30 minE=1000 J/sec

Q: Which law of thermodynamics is most pertinent to the statementthat “all the king’s horses and all…

A: Second law of thermodynamics is most pertinent to the situation. This law states that physical…

Q: (a) If 585 J of heat are added to 49 moles of a monatomic gas at constant volume, how much does the…

A: Heat, H = 585 J  number of moles, n = 49  Cv =3/2 R  CR = 5/2 R

Q: Can you warm a kitchen by leaving the door of a hot oven open? Explain.

A: Yes. It is possible to warm the kitchen by leaving the door of a hot oven open.

Q: 1) If a liquid has a specific gravity greater than one, it should eventually float to the top after…

A:

Q: (a) A woman climbing the Washington Monument metabolizes 6.00×102 kJ of food energy. If her…

A: Given data: Energy, E=6.00×102kJ=6×105J Efficiency, η=18%=0.18

Q: A system absorbs 199 kJ heat and does 48 kJ of work. What is the net change in the internal energy…

A: Given: Heat absorbed, Q=199 kJ Work done by system, W= -48 kJ ( negative indicate work done by…

Q: engine

A: Efficiency for a Carnot engine is given by the following formula. η=1-T2T1orη=WQ1 where T1 and T2…

Q: 10. Compute the amount of latent heat taken up when 5 kg of liquid water evaporates.

A: Latent Heat Latent heat is defined as the amount of heat required for a state change. This heat does…

Q: A Carnot refrigerator extracts heat from a freezer at -5 degree C and exhausts it at 25 degree C .…

A: Convert the temperature from degree centigrade to Kelvin. And

Q: The zeroth law of thermodynamics requires that ?

A: For zeroth law of thermodynamics we need three bodies.

Q: . Compute the amount of latent heat released when 50 kg of liquid water freezes.

A:

Q: A balloon holding 4.20 moles of helium gas absorbs 905 J of thermal energy while doing 106 J of work…

A: Solution:-Given thatnumber of moles (n)=4.2 molesThermal enegry absorbed by gas (Q)=905 JWorkdone by…

Q: If you shake a jar full of jelly beans of different sizes, the larger beans tend to appear near the…

A:

Q: 3. Compute cyand cp for a diatomic gas with molar mass 28.02 kg/kmol, at tempera- ture 0°C.

A: Cv= Molar specific heat of gas -it is defined as amount of heat required to raise temperature of one…

Q: (a) A cyclical heat engine, operating between temperatures of 450C and 150C produces 4.00 MJ of work…

A: (a) The net heat transfer is ΔQ=Qin+Qout In this case, ΔQ=5+Qout The first law of thermodynamics…