Advertisements
Advertisements
प्रश्न
State Kelvin-Planck's statement of the second law of thermodynamics.
Advertisements
उत्तर
Kelvin-Planck's statement: It is impossible to construct a heat engine that operates in a cycle, whose sole effect is to convert the heat completely into work. This implies that no heat engine in the universe can have 100% efficiency.
APPEARS IN
संबंधित प्रश्न
Answer in brief.
What sets the limits on the efficiency of a heat engine?
Draw a p-V diagram and explain the concept of positive and negative work. Give one example each.
The figure shows the V-T diagram for one cycle of a hypothetical heat engine which uses the ideal gas. Draw the p-V diagram diagram of the system.
The efficiency of a heat engine working between the freezing point and boiling point of water is ____________.
A Carnot engine whose efficiency is 45% takes heat from a source maintained at a temperature of 327°C. To have an engine of efficiency of 60% what must be the intake temperature for the same exhaust (sink) temperature?
Heat engine transfers ______.
Which statement is incorrect?
Let η1 is the efficiency of an engine at T1 = 447°C and T2 = 147°C while η2, is the efficiency at T1 = 947°C and T2 = 47°C. The ratio `eta_1/eta_2` will be ______.
What is a heat engine?
Mention any two elements of a heat engine.
