QUESTION 7A sample of nitrogen gas undergoes the cyclic thermodynamic process shown inthe figure. Which of the following gives the net heat transferred to the system inNotyet answeredMarked out of 2.00P Flag questionone complete cycle 1 2 3→1? the scale in the graph is given by P, =3000 Pa and3V3 =0.03 m3.P (Pa) 4P33►V (mV3Select one.a. 360]O b-360]Oc-180]Od.720]Oe.180)2.

Given: The sample of the nitrogen gas undergoing the cyclic thermodynamic process. Net heat…

Answered: QUESTION 7 A sample of nitrogen gas…

University Physics Volume 2

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Chapter3: The First Law Of Thermodynamics

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Problem 17CQ: There is no change in the internal of an ideal gas undergoing an isothermal process since the...

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In a cylinder, a sample of an ideal gas with number of moles n undergoes an adiabatic process. (a) Starting with the expression W=PdV and using the condition PV = constant, show that the work done on the gas is W=(11)(PfVfPiVi) (b) Starting with the first law of thermodynamics, show that the work done on the gas is equal to nCV(Tf Ti). (c) Are these two results consistent with each other? Explain.
(a) How much heat transfer is necessary to raise the temperature of a 0.200kg piece of ice from 20.0C to 130C, including the energy needed for phase changes? (b) How much time is required for each stage, assuming a constant 20.0kJ/s rate of heat transfer? (c) Make a graph of temperature versus time for this process.
Practical steam engines utilize 450C steam, which is later exhausted at 270C. (a) What is the maximum eficiency that such a heat engine can have? (b) Since 270C steam is still quite hot, at second steam engine is sometimes operated using the exhaust of the first. What is the maximum eficiency of the second engine if its exhaust has a temperature of 150C ? (c) What is the overall eficiency of the two engines? (d) Show that this is the same eficiency as a single Carnot engine operating between 450C and 150C. Explicitly show how you follow the steps in the Problem-Solving Strategies for Thermodynamics.
(a) Calculate the work done by the gas along the closed path shown below. The curved section between R and S is semicircular. (b) If the process is carried out in the opposite direction, what is the work done by the gas?
(a) How much food energy will a man metabolize in the process of doing 35.0 kJ of work with an efficiency of 5.00%? (b) How much heal transfer occurs to the environment to keep his temperature constant? Explicitly show how you follow the steps in the Problem—Solving Strategy for thermodynamics found in Problem-Solving Strategies for Thermodynamics.
(a) What is the work output of a cyclical heat engine having a 22.0% eficiency and 6.00109J of heat transfer into the engine? (b) How much heat transfer occurs to the environment?
There is no change in the internal of an ideal gas undergoing an isothermal process since the internal energy depends only on the temperature. Is it therefore correct to say that an isothermal process is the same as an adiabatic process for an ideal gas? Explain your answer. `
(a) An ideal gas expands adiabatically from a volume of 2.0103 m3 to 2.5103 m3. If the initial pressure and temperature 5.0105 Pa and 300 K, respectively, what are the final pressure and temperature of the gas? Use =5/3 for the gas. (b) In an isothermal process, an ideal gas expands from a of 2.0103 m3 to 2.5103 m3. If the initial pressure and temperature were 5.0105 Pa and 300 K, respectively, what are the final pressure and temperature of the gas?
If a gas is compressed isothermally, which of the following statements is true? (a) Energy is transferred into the gas by heat. (b) No work is done on the gas. (c) The temperature of the gas increases, (d) The internal energy of the gas remains constant, (e) None of those statements is true.
(a) Calculate the rate of heat transfer by radiation from a car radiator at 110C into a 50.0C environment, if the radiator has an emissivity of 0.750 and a 1.20m2 surface area. (b) Is this a significant fraction of the heat transfer by an automobile engine? To answer this, assume a horsepower of 200 hp (1.5 kW) and the efficiency of automobile engines as 25%.
One method of converting heat transfer to doing work is for heat transfer into a gas to take place, which expands, dong work on a piston, as shown in the figure below. (a) Is the heat transfer converted directly to work in an isobaric process, or does it go through another form first? Explain your answer. (b) What about in an isothermal process? (c) What about in an adiabatic process (where heat transfer occurred prior to the adiabatic process)?
How much work is required to compress 5.00 mol of air at 20.0C and 1.00 atm to one-tenth of the original volume (a) by an isothermal process? (b) What If? How much work is required to produce the same compression in an adiabatic process? (c) What is the final pressure in part (a)? (d) What is the final pressure in part (b)?

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