Thermodynamics questions
1906 published questions with worked solutions.
- A carnot engine whose efficiency is 40%, takes in heat from a source maintained at a temperature of 500 K. It is desired to have...
- A gas expands 0.25 m^3 at constant pressure 10^3 N/m^2 , the work done is
- If = 2.5 and volume is equal to 1 8 times to the initial volume then pressure P' is equal to (Initial pressure = P) [RPET 2003,...
- Air in a cylinder is suddenly compressed by a piston, which is then maintained at the same position. With the passage of time [D...
- An adiabatic process occurs at constant [AIIMS 1999, UPSEAT 1999, Pb. PET 2000, Pb. PET 2004]
- The internal energy change in a system that has absorbed 2 kcal of heat and done 500 J of work is
- A Carnot engine takes 3 10^6 cal of heat from a reservoir at 627 ,^ C and gives it to a sink at 27 ,^ C . The work done by the...
- When heat energy of 1500 joules is supplied to a gas at constant pressure 2.1 10^5 N/m^2 , there is an increase in its volume...
- 1 mm^3 of a gas is compressed at 1 atmospheric pressure and temperature 27 ,^ C to 627 ,^ C . What is the final pressure under...
- A scientist says that the efficiency of his heat engine which operates at source temperature 127 ,^ C and sink temperature 27 ,^...
- If the door of a refrigerator is kept open, then which of the following is true? [JIPMER 2002, AIEEE 2002, CPMT 2003]
- A cylinder fitted with a piston contains 0.2 moles of air at temperature 27 ,^ C . The piston is pushed so slowly that the air...
- The efficiency of a Carnot engine which operates between the two temperatures T_1 = 500 K and T_2 = 300 K is
- If the amount of heat given to a system is 35 J and the amount of work done on the system is 15 J, then the change in internal...
- 5.6 litre of helium gas at S.T.P. is adiabatically compressed to 0.7 litre. Taking the initial temperature to be T_1, the work...
- When an ideal gas in a cylinder was compressed isothermally by a piston, the work done on the gas was found to be 1.5 10^4...
- U + W = 0 is valid for [RPMT 2000]
- During the adiabatic expansion of 2 moles of a gas, the internal energy of the gas is found to decrease by 2 joules, the work...
- The amount of heat given to a system in a cyclic thermodynamical process [RPET 1992, RPMT 1988]
- One mole of an ideal gas at an initial temperature of T K does 6R joules of work adiabatically. If the ratio of specific heats of...
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