1. Chapter 1 INTRODUCTION AND BASIC CONCEPTS Thermodynamics 1- 1C Classical thermodynamics is based on experimental. Home · Documents; Termodinamica – 5ta Edicin -Yunus a. Cengel & Michael a. Boles. LIBROS UNIVERISTARIOS Y Approach Seventh Edition Yunus A. Cengel, Michael A. Boles McGraw-Hill, Analysis The mass of the air in the room is ROOM 3 3 AIR m = ρV = ( kg/m)(6 × 6 × 8.

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Analysis The weight of the rock is N Work is being done on the air as it passes over and through the car. Using EES or other software, investigate the effect of glass thickness on heat loss for the specified glass surface temperatures. Forests in those areas also experience a slow death due to absorbing the acids through their leaves, needles, and roots.

Ds The densities of air and mercury are given to be 1. Analysis Both fluids are open to the atmosphere. Analysis The lower and upper limits of comfort range in C are C The microscopic forms of energy, on the other hand, are those related to the molecular structure of a system and the degree of the molecular activity, and are independent of outside reference frames.

The effect of frictional losses in a pump is always to convert mechanical energy to an equivalent amount of thermal energy, which results in a slight rise in fluid temperature. Analysis Using the conversion relation between the temperature scales, C Assumptions The density of air is constant throughout the room. The system can also interact with the surroundings by exchanging heat and work across its control boundary. The rate of heat transfer between a person and the surrounding air by convection is to be determined.

Hydrogen can be obtained from water by using another energy source, such as solar or nuclear energy, and then the hydrogen obtained can used as a fuel to power cars or generators.

For a given oil-level difference between the two columns, the absolute pressure in the tank is to be determined. Using proper conversion factors, the unit cost of each steak is determined to be 12 ounce steak: The overall efficiency of the pump- motor unit and the pressure difference between the inlet and the exit of the pump are to be determined.


The increasing pressure with depth in a fluid, for example, should be balanced by increasing weight.

Solucionario Termodinamica Cengel 7ed | Alexander Cortés –

Analysis We take the contents of the cylinder as the system. The amount of heat transferred through the glass in 5 h is to be determined. Analysis We take the free surface of the reservoir to be point 1 and the turbine exit to be point 2. At triple point the three phases of a pure substance coexist in equilibrium.

The electric power generation, the daily electricity production, and the monetary value of this electricity are to be determined.

Analysis The initial state is superheated vapor. The work needed to move along this ramp is to be determined considering a the man and b the cart and its contents as the system.

Let the glass thickness vary from 0. Assumptions 1The wind is blowing steadily at specified velocity during specified times.

Termodinámica – Yunus A. Cengel, Michael A. Boles – 7ma Edición

The system with the lowest energy cost is to be determined. Therefore, its effect on the pressure difference between the two pipes is negligible.

Also, a change of 1 K or 1C in temperature corresponds to edixion change of 1. The height of each fluid in that arm is to be determined.

Leaded gasoline contains lead that ends up in the exhaust. The rate of heat transfer through the window is to be determined. Assumptions The city uses electricity produced by a coal power plant.

The atmospheric pressures at various locations are to be determined.

Properties The density of air is given to be 1. An example of Pascals principle is the operation of the hydraulic car jack. The difference between the pressures acting on the head and on the toes is to be determined.

Termodinamica – 5ta Edicin -Yunus a. Cengel & Michael a. Boles

Discussion This problem can also be solved by considering a point at the turbine inlet, and using fermodinamica energy instead of potential energy.


Analysis This is a constant pressure process. The temperature of the outer surface is to be determined. The inner surface temperature of the bottom of the pan is given. The reduction in the CO2 production this household is responsible for is to be determined.

This thrust is to be expressed in N and kgf. The power generation potential is to be determined.

Solucionario Termodinamica, Yunus Cengel 6ta edicion – [PDF Document]

Assumptions The variation of the density of water with depth is negligible. Using EES or other software, investigate the effect of the convection heat transfer coefficient on the surface temperature of the plate.

The rate of heat transfer to the water is to be determined. Analysis Substituting the given data into the potential energy expression gives Btu2.

Properties The specific gravities of mercury and oil are given to be Discussion Double instrumentation like this allows one to verify the measurement of one of the instruments by the measurement of another instrument. Discussion The conservation of energy principle requires the energy to be conserved as it is converted from one form to another, and it does not allow any energy to be created or destroyed during a process.

Acceleration is to be plotted against the number of people, and the results are to be discussed. The lowest cost energy source is to be determined. A relation for the variation of density with elevation is to be obtained, the density at 7 km elevation is to be calculated, and the mass of the atmosphere using the correlation is to be estimated.

The maximum amount of load the balloon can carry is to be determined. The temperature of the base of the iron is to be determined in steady operation.