Why is the condensation part of the cycle in a steam turbine so essential?

Q: A heat engine with a thermal efficiency of 45 percent rejects 500 kJ/kg of heat. How much heat does…

A: Given:  Efficiency = 45 %  heat rejected, QC = 500 kJ/kg

Q: What is the significance of steam engine?

A: Its a concept of heat engine

Q: why heat is called energy in transit?

A: Heat is a form of energy. It is defined as the process of transfer of energy from a higher…

Q: Steam expands behind a piston doing 67,800 joules of work. If 12.7 kJ of heat is radiated to the…

A: Given ∆Q=-12.7kJ∆W=-67.8kJ

Q: On a Mack mp8 engine Piston primarily cooled

A: Piston in mack mp8 engines are oil cooled .

Q: Consider laminar forced convection in a circular tube. Will the heat flux be higher near the inlet…

A: In general, the heat transfer coefficient and wall shear stresses are higher at the region where the…

Q: What are the characteristics of all heat engines?

A:

Q: When you open the door to an air conditioned room in the summer are you letting cold air out or hot…

A: When the door to an air conditioned room in the summer is opened.   And we need to tell whether we…

Q: Discuss the practical advantages and disadvantages of heat pumps and electric heating.

A:

Q: Calculate the total thermal energy in a liter of helium at roomtemperature and atmospheric pressure.…

A: As helium is a monatomic gas, so the total thermal energy of a monatomic gas will be, Here, n, R…

Q: Does the second law of thermodynamics alter the conservation of energy principle?

A: The law of conservation of energy states that energy can neither be created nor be destroyed, it can…

Q: Which do you think has the greater entropy, 1 kg of solidiron or 1 kg of liquid iron? Why?

A: Entropy is defined as the degree of randomness.

Q: what happens to internal energy of sytem when mechanical work is done on it? what happens to its…

A: When mechanical work is done on the system internal energy of the system increases.Temperature of…

Q: Why does the high specific heat of water have to do with convection currents in the air at the…

A: Water has a high specific heat capacity (of 4200 J/Kg°C) on the seashore and the land has a much…

Q: What happens if the calorimeter is not covered properly?

A: Calorimeter or bomb calorimeter is defined as a apparatus used for measuring the amount of heat…

Q: How does the law of the conservation of energy relate to the first law of thermodynamics?

A:

Q: How does the second law of thermodynamics relate to the direction of heat flow?

A: Let us understand this with an example. A hot cup of coffee is kept in open atmosphere.

Q: What is a heat pump?

A: Heat pump is a device that is used for transfer of heat in and out of the system. When it's cold…

Q: A thermodynamic process that happens very quickly tends to be:

A: A thermodynamic process that happens very quickly tends to be which process.

Q: Is there a distinction between thermal energy and internal energy?

A:

Q: A steam-driven turbine is one major component of an electric power plant. Why is it advantageous to…

A: A steam turbine works on the principal of conversion of energy. The energy in the steam stored in…

Q: Does adding heat to a system always increase its internal energy?

A:

Q: The box “Thermodynamics Dramatized” shows the crushing of an inverted steam-filled can placed in a…

A: The water in the pan need not be cold. The water in the pan should be cooler than the water in the…

Q: A power station with an efficiency of 0.4 generates 108 W of electric power and dissipates 1.5 × 108…

A: The heat energy required to raise the temperature of a substance is given by,

Q: What is meant by dynamical theory of heat?

A: According to dynamic theory of heat everybody is made of small particles called molecules.This…

Q: How does the second law relate to heat engines?

A:

Q: Why is insulation in an attic commonly thicker than the insulation in the walls of a house?

A: It is a basic law of physics that heat rises. Therefore, more heat can be lost at the ceiling or…

Q: Name the method of heat transfer which doesnot depend on gravity.

A: In radiation, heat is transferred without any motion of the medium particles

Q: Adiabatic expansion produces a cooling , why?

A: An adiabetic process is carried out in such a way that the total heat of the system always remains…

Q: What is meant by thermodynamics?

A:

Q: Consider an engine with efficiency of 25 percent. How much must the temperature of the hot reservoir…

A:

Q: Explain the adiabatic compression ?

A: The thermodynamic process in which there is no exchange of heat from the system to its surrounding…

Q: Is it condensation or vaporization that occurs on the warm outside coils of an operating air…

A: As the refrigerant in vapor phase at high temperature and pressure enters the warm condenser coils…

Q: Does a hot object contain internal energy or does it contain heat?

A: Heat is the energy transferred from hot object to the cold object.

Q: What determines whether an object is a net absorber or net emitter of radiant energy at given time?

A: All substance above absolute temperature emit radiant energy. Whether the object emits more than it…

Q: Why is there a need for a quick transfer of the hot shots into the water in the calorimeter?

A: The transfer hot shots into the water in calorimeter should be done as quick as possible.

Q: Does heat flow into cold areas or does cold flow into hot areas?

A: Yes heat flows from hot to cold area or we can say it moves with the help of particle or atom. for…

Q: No work is done in a constant-volume process. Why?

A: Isochoric Process: In heat transfer, the constant volume process is also known as the isochoric…