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  1. Problems
  2. /Heat & Thermodynamics
  3. /Heat Engines, the Second Law and Entropy

Heat Engines, the Second Law and Entropy

Physics
+ Upload a Problem
More in Heat & ThermodynamicsTemperature and Thermal ExpansionCalorimetry and Change of StateHeat TransferKinetic Theory of GasesLaws of ThermodynamicsThermodynamic Processes and Specific Heats of GasesHeat Engines, the Second Law and Entropy
12 problems
Type:
1.
0.50 kg of water at 75 °C is poured into 1.5 kg of water at 15 °C in an insulated jug.
High School (11–12) · Heat Engines, the Second Law and EntropyStemPy LabStemPy Lab
Hard
2.
0.75 mol of an ideal gas in an insulated box rushes into a vacuum when a wall is removed, growing…
High School (11–12) · Heat Engines, the Second Law and EntropyStemPy LabStemPy Lab
Medium
3.
1800 J of heat flows from a very large body at 540 K to a very large body at 270 K.
High School (11–12) · Heat Engines, the Second Law and EntropyStemPy LabStemPy Lab
Medium
4.
0.35 kg of ice at 0 °C melts, and the water then warms to 20 °C.
High School (11–12) · Heat Engines, the Second Law and EntropyStemPy LabStemPy Lab
Easy
5.
A Carnot engine works between 880 K and 286 K and gives out 12 kW of mechanical power.
High School (11–12) · Heat Engines, the Second Law and EntropyStemPy LabStemPy Lab
Hard
6.
A refrigerator keeps its inside at 4 °C in a kitchen at 32 °C.
High School (11–12) · Heat Engines, the Second Law and EntropyStemPy LabStemPy Lab
Medium
7.
A Carnot engine works between 450 K and 306 K.
High School (11–12) · Heat Engines, the Second Law and EntropyStemPy LabStemPy Lab
Medium
8.
An engine takes 4200 J of heat from its hot reservoir each cycle and gives 2940 J to the cold one.
High School (11–12) · Heat Engines, the Second Law and EntropyStemPy LabStemPy Lab
Easy
9.
A gas goes round a cycle of three steps.
High School (11–12) · Heat Engines, the Second Law and EntropyStemPy LabStemPy Lab
Medium
10.
Say whether each process is nearly reversible or irreversible, and give a reason.
High School (11–12) · Heat Engines, the Second Law and EntropyStemPy LabStemPy Lab
Medium
11.
An inventor claims a machine that takes 3200 J of heat from the water of a lake in each cycle and…
High School (11–12) · Heat Engines, the Second Law and EntropyStemPy LabStemPy Lab
Easy
12.
A gas goes round a rectangle on a pressure-volume graph.
High School (11–12) · Heat Engines, the Second Law and EntropyStemPy LabStemPy Lab
Easy