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ProblemsClear skill: Potentials Build a practice set

ProblemCourse & topicStatus

THERMO:9907101Two reversible Carnot heat engines operate in series.

PotentialsThermodynamics Problem Solving

Thermodynamic potentials and Legendre transformsThermodynamics · Calculation

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THERMO:9907102A copper billet of mass 3.50 kg is heated at atmospheric pressure from 20 °C to 180 °C.

PotentialsThermodynamics Problem Solving

Thermodynamic potentials and Legendre transformsThermodynamics · Calculation

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THERMO:9907103A closed cylinder contains 0.120 kg of air, modelled as an ideal gas with R = 0.287 kJ/kg·K, at a uniform…

PotentialsThermodynamics Problem Solving

Thermodynamic potentials and Legendre transformsThermodynamics · Calculation

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THERMO:9907104Mathematical problem title

PotentialsThermodynamics Problem Solving

Thermodynamic potentials and Legendre transformsThermodynamics · Calculation

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THERMO:9907105A kettle holds 2.00 kg of saturated liquid water at 100 °C.

PotentialsThermodynamics Problem Solving

Thermodynamic potentials and Legendre transformsThermodynamics · Calculation

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THERMO:9907106In steady operation, heat leaks through the wall of a cold store at a rate of 1.80 kW.

PotentialsThermodynamics Problem Solving

Thermodynamic potentials and Legendre transformsThermodynamics · Calculation

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THERMO:9907107Air is contained in a rigid, closed tank of volume 0.350 m³.

PotentialsThermodynamics Problem Solving

Thermodynamic potentials and Legendre transformsThermodynamics · Calculation

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THERMO:9907108Mathematical problem title

PotentialsThermodynamics Problem Solving

Thermodynamic potentials and Legendre transformsThermodynamics · Calculation

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THERMO:9907109Two streams of air mix steadily, adiabatically, and at constant pressure of 100 kPa in an insulated chamber.

PotentialsThermodynamics Problem Solving

Thermodynamic potentials and Legendre transformsThermodynamics · Calculation

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THERMO:9907110Mathematical problem title

PotentialsThermodynamics Problem Solving

Thermodynamic potentials and Legendre transformsThermodynamics · Calculation

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THERMO:9907111Air is compressed steadily from 100 kPa, 290 K to 700 kPa, 540 K in an adiabatic compressor.

PotentialsThermodynamics Problem Solving

Thermodynamic potentials and Legendre transformsThermodynamics · Calculation

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THERMO:9907112Mathematical problem title

PotentialsThermodynamics Problem Solving

Thermodynamic potentials and Legendre transformsThermodynamics · Calculation

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THERMO:9907113One kilogram of a working fluid executes a cycle that appears on the T–s diagram as a rectangle.

PotentialsThermodynamics Problem Solving

Thermodynamic potentials and Legendre transformsThermodynamics · Calculation

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THERMO:9907114Mathematical problem title

PotentialsThermodynamics Problem Solving

Thermodynamic potentials and Legendre transformsThermodynamics · Calculation

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THERMO:9907115A refrigerant is throttled adiabatically from saturated liquid at 0.80 MPa to 0.12 MPa in a well-insulated valve.

PotentialsThermodynamics Problem Solving

Thermodynamic potentials and Legendre transformsThermodynamics · Calculation

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THERMO:9907116A Carnot cycle uses water as the working fluid.

PotentialsThermodynamics Problem Solving

Thermodynamic potentials and Legendre transformsThermodynamics · Calculation

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THERMO:9907117A reversible Carnot heat engine absorbs 150 kW of heat from a source at 800 K and rejects heat to a sink at 320 K.

PotentialsThermodynamics Problem Solving

Thermodynamic potentials and Legendre transformsThermodynamics · Calculation

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THERMO:9907118Hot oil is cooled from 140 °C to 80 °C at 0.350 kg/s in a steady adiabatic heat exchanger by a water stream that…

PotentialsThermodynamics Problem Solving

Thermodynamic potentials and Legendre transformsThermodynamics · Calculation

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THERMO:9907119A rigid, well-insulated tank contains 1.80 kg of air at 120 kPa and 22 °C.

PotentialsThermodynamics Problem Solving

Thermodynamic potentials and Legendre transformsThermodynamics · Calculation

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THERMO:9907120Air is compressed steadily from 95.0 kPa, 18 °C to 650 kPa, 175 °C.

PotentialsThermodynamics Problem Solving

Thermodynamic potentials and Legendre transformsThermodynamics · Calculation

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THERMO:9907121A four-stroke spark-ignition engine is modelled as a cold air-standard Otto cycle.

PotentialsThermodynamics Problem Solving

Thermodynamic potentials and Legendre transformsThermodynamics · Calculation

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THERMO:9907122An air-standard Otto cycle has a compression ratio r=8.40.

PotentialsThermodynamics Problem Solving

Thermodynamic potentials and Legendre transformsThermodynamics · Calculation

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THERMO:9907123A four-stroke automotive engine operating on a cold air-standard Otto cycle has a compression ratio r=10.5, a…

PotentialsThermodynamics Problem Solving

Thermodynamic potentials and Legendre transformsThermodynamics · Calculation

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THERMO:9907124Mathematical problem title

PotentialsThermodynamics Problem Solving

Thermodynamic potentials and Legendre transformsThermodynamics · Calculation

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A closed system contains 2.00 kg of nitrogen, modelled as an ideal gas with

c_p

= 1.040 kJ/kg·K,

c_v

= 0.743…

Superheated steam enters a turbine at 6.00 MPa, 500 °C with

h_1

= 3422.2 kJ/kg and

s_1

= 6.8803 kJ/kg·K, and…

Steam enters a turbine at 4.00 MPa, 440 °C with

h_1

= 3305.0 kJ/kg and

s_1

= 6.8500 kJ/kg·K, and leaves at 50 kPa.

Steam enters a nozzle at 1.20 MPa, 320 °C with speed

V_1

= 40.0 m/s,

h_1

= 3093.0 kJ/kg, and

s_1

= 7.1359 kJ/kg·K.

Steam expands in a turbine from state 1 at

T_1

= 480 °C,

s_1

= 6.880 kJ/kg·K,

h_1

= 3340.0 kJ/kg to an exit…

Two cold air-standard Otto cycles operate with the same inlet state

P_1=90.0\,\mathrm{kPa}

,

T_1=288\,\mathrm{K}

…