Attempt any 22 (twenty two) short question from Question 2,3 and 4, at least 8 short questions from question short question from question 3 and 6 short question from question 4. All question carry equal marks.
Q.No. 2 Write answers of any EIGHT questions.
(8x2-16)
Write down three example of adiabatic process.
How petrol engine differ from diesel engine.
Why do we reduce the pressure in the tyer while moving on the motorway? Write the condition for 100% efficiency of a Carnot heat engine?
What is triple point of water? Give an idea of working of refrigerator.
Why the efficiency of real heat engine is less than Carnot heat engine?
When two systems are in thermal equilibrium, do they have the same amount of kinetic energy?
Is it possible, according to the second law of thermo Dynamics, to construct an engine that is free from thermal pollution?
지
If a pendulum clock has to keep correct time at different temperatures, will it be better to use aluminum or
steel? What are some factors that affect the efficiency of automobile engine? Will one kilogram of hydrogen contain more atoms than one kilogram of lead? Explain.
Q.No. 3 Write answers of any EIGHT questions.
Why is the earth not in thermal equilibrium with the sun?
(8x2=16)
in the middle
How do you distinguish between temperature and heat? Give examples Give an example of a natural process that involves an increase in entropy.
Does entropy of a system increases or decreases due to friction? Can the mechanical energy be converted completely into heat energy? If so give an ample.
What happens to the temperature of the room, when an air conditioner is left running on a table of the room?
Define entropy, and explain the term 'heat death in relevance to this topi:? Is it possible to construct a heat engine that will not expel heat into the atmosphere?
is it possible to convert internal energy into mechanical energy? Explain with an example
Give an example of a process in which no heat is transferred to or from the system but the temperature of the system changes.
What are the environmental crises we are facing due to the direct impact of thermodynamics? Variation of volume by pressure is given in Fig. A gas is taken along the paths ABCA and A to A What will be the change in internal energy?
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