Show that the ideal efficiency is 90% for an engine in which fuel is heated to 3000K and the surrounding air is 300K?

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: A steam engine operates at an overall efficiency of 15%. How much heat be supplied per hour in order…

A: Heat supplied per hour P=WtP=ηQtQt=Pη

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: Calculate the efficiency of a heat engine which extracts 3 billion Joules of useful work when 10…

A:

Q: What happend whe First law of Thermodynamics is applied to closed system ?

A: The first law of thermodynamics can be applied to closed system during an interaction between a…

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: Calculate the ideal efficiency of an engine in which fuel is heated to 2700K and the surrounding air…

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Q: If a heat engine extracts 50 million Joules of useful work when 100 million Joules of heat energy is…

A: Input heat energy = 100 million joules Work done = 50 million joules

Q: Is the study of thermodynamics concerned primarily with microscopic processes or with macroscopic…

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Q: Entropy states that a system tends towards (There are two correct answers, pick both of them)

A: Entropy is measure of disorder and tendency towards disorder requires energy.

Q: What is the intensive and extensive property of thermodynamics?

A: Intensive properties are those properties whose values do not depend on the quantity of matter.…

Q: Defend the statement that 100% of the electrical energy that goes into lighting a lamp is converted…

A: The statement that 100% of the electrical energy that goes into lighting a lamp is converted to…

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

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Q: Suppose you spend 30.0 minutes on a stairclimbing machine, climbing at a rate of 90.0 steps per…

A: The efficiency of the machine is

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

A:

Q: A nuclear power plant has an electrical power output of 1300 MW and operates with an efficiency of…

A: Q in = Power / eff = 1300 / 0.33 = 3939.39 MW So, Q out = Q in - W = 2939.39 MW

Q: Caleu Jate the ekcfoical energy comsume d in Jou Jer if a toaetes of 58 W 18 ysed for 28 minutes P…

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Q: Is it impossible to convert the heat from a single source into work without any other effect?

A: heat is converted work

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: How does the second law relate to heat engines?

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Q: Show that the ideal efficiency is 90% for an engine in which fuel is heated to 3000 K and the…

A: The temperature of the surrounding air,

Q: How much heat is needed to produce 13 J of energy from a heat engine with an efficiency of 0.3? 3.9…

A:

Q: Do adiabatic processes apply only to gases? Defend your answer.

A: Adiabatic processes do not apply only to gases.

Q: Consider an ocean thermal energy conversion (OTEC) power plant that operates on a temperature…

A:

Q: What is the physical explanation for the loss in entropy?

A: Physical Explanation of Entropy Entrpy is a measure of randomness of any system or associated with…

Q: Discuss the concept of entropy.

A: Entropy is the measurements of degree of disorder ( or randomness ) in a system. Its unit is…

Q: What is thermodynamic identity ?

A: To determine: What is meant by thermodynamic identity?

Q: What restriction does the first law of thermodynamics place on the possibility of building a…

A: Introduction: In a perpetual motion, when the motion is set, it continues motion forever with no…

Q: Show that heat always flows from high temperature to low temperature.

A: Heat always flows from high temperature to low temperature because of Second law of thermodynamics

Q: Does human body follow laws of thermodynamics?

A: Yes, it completely does. An example of the same is when you are sitting in a crowded room, you tend…

Q: What does the A thermodynamic system include?

A: A thermodynamical system

Q: What is meant by thermodynamics?

A:

Q: A 10-kg crate starts with a speed of v = 14.3 m/sec at the bottom of a rough incline. If it rises h…

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Q: The ideal efficiency for a heat engine operating between the temperatures of 430 degrees C and 27…

A: The correct answer is 57% i.e. option (A)

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

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Q: What are the various states of equilibrium in thermodynamics?

A: Equilibrium is a state in thermodynamics, in which, at least one property remains constant. There…

Q: What happens to the efficiency of a heat engine when the temperature of a reservoir into which…

A: Efficiency of heat engine can be given as:

Q: Steam engine is called a reciprocating double acting engine, Why?

A: Steam engine converts heat energy into mechanical energy and heat is then supplied into the engine…

Q: What does it mean to say that human body is an engine with an efficiency of 20 percent?

A:

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…