Second Law Statement
Kelvin-Planck statement forbids a heat engine that?
Select the correct option:
🔒 Solution Hidden from View
Submit your answer to unlock the detailed step-by-step solution.
More thermodynamics Practice Questions
For a diatomic ideal gas the molar specific heat at constant volume is 5R/2, so what is the value of...
For a diatomic ideal gas the molar specific heat at constant volume is 5R/2, so what is the value of...
A gas is taken around a complete thermodynamic cycle and returns to its original state after several...
A gas is taken around a complete thermodynamic cycle and returns to its original state after several...
Two moles of an ideal gas expand isothermally at 300 K from a volume V to a volume 2V in a slow reve...
Two moles of an ideal gas expand isothermally at 300 K from a volume V to a volume 2V in a slow reve...
A balloon suddenly bursts and the compressed gas inside rushes out into the open atmosphere very rap...
A balloon suddenly bursts and the compressed gas inside rushes out into the open atmosphere very rap...
When 2 moles of a monatomic ideal gas are heated at constant pressure causing a temperature rise of ...
When 2 moles of a monatomic ideal gas are heated at constant pressure causing a temperature rise of ...
On a pressure-volume diagram an isothermal curve and an adiabatic curve pass through the same point ...
On a pressure-volume diagram an isothermal curve and an adiabatic curve pass through the same point ...
A heat pump uses 200 J of work to deliver a total of 800 J of heat into a warm room during each oper...
A heat pump uses 200 J of work to deliver a total of 800 J of heat into a warm room during each oper...
Two identical samples of the same ideal gas are kept at the same temperature but stored at very diff...
Two identical samples of the same ideal gas are kept at the same temperature but stored at very diff...
One mole of an ideal gas is compressed isothermally at temperature 300 K, so what happens to its int...
One mole of an ideal gas is compressed isothermally at temperature 300 K, so what happens to its int...
Heat of 400 J is supplied to a gas sealed inside a rigid steel container whose volume cannot change,...
Heat of 400 J is supplied to a gas sealed inside a rigid steel container whose volume cannot change,...
An ideal gas expands at a constant pressure of 2 × 10^5 Pa, increasing its volume from 0.01 m^3 to 0...
An ideal gas expands at a constant pressure of 2 × 10^5 Pa, increasing its volume from 0.01 m^3 to 0...
A gas confined in a perfectly insulated cylinder is suddenly compressed by a fast-moving piston, so ...
A gas confined in a perfectly insulated cylinder is suddenly compressed by a fast-moving piston, so ...
About This Question
- Subject
- physics
- Chapter
- thermodynamics
- Topic
- second law statement
- Difficulty
- Hard
- Year
- 2025
Solution
Correct Answer:
Converts all heat from single reservoir into work
- Second Law of Thermodynamics: Defines the direction of spontaneous processes and limits of heat engines.
- Kelvin-Planck Statement: It is impossible to construct an engine which, operating in a cycle, will produce no other effect than the extraction of heat from a single reservoir and the performance of an equivalent amount of work.
- Meaning: Efficiency can never be 100%. Some heat must be rejected to a colder reservoir (sink).
- Clausius Statement: (Option 3) Forbids spontaneous heat transfer from cold to hot. Both statements are logically equivalent.
This hard difficulty physics question is from the chapter thermodynamics, covering the topic of second law statement. It appeared in the 2025 exam.
Looking for more practice? Explore all physics questions or browse thermodynamics questions on RankGuru.