Thermodynamics questions
1906 published questions with worked solutions.
- An electric heater supplies heat to a system at a rate of 100 W. If the system performs work at a rate of 75 J/s, then the rate...
- Consider the following reaction : 2A(g) + B(g) 2D(g) U^ = -10 kJ mol ^ -1 and S^ = -44 JK ^ -1 at 298 K. Identify the **correct**...
- In an adiabatic expansion, the temperature of one mole of an ideal monatomic gas ( =5/3) decreases from 60 K to 50 K. The work...
- Two moles of an ideal gas undergo free expansion from 10 L to 100 L at 300 K. The values of S_ system and S_ surroundings are (R...
- A protein undergoes reversible thermal denaturation from its initial state N to denatured state D according to N D. At 60^ , the...
- Consider a spherical shell of radius R at temperature T. The black body radiation inside it can be considered as an ideal gas of...
- A solid body of constant heat capacity 1 J (^ C)^ -1 is being heated by keeping it in contact with reservoirs in two ways: (i)...
- The following reaction is performed at 298 K. 2NO(g) + O_2(g) 2NO_2(g). The standard free energy of the formation of NO(g) is...
- Which one of the following alkaline earth metal sulphates has its hydration enthalpy greater than its lattice enthalpy?
- The heat of atomization of methane and ethane are 360 kJ mol^ -1 and 620 kJ mol^ -1 , respectively. The longest wavelength of...
- The heats of combustion of carbon and carbon monoxide are -393.5 and -283.5 kJ mol^ -1 , respectively. The heat of formation (in...
- The ratio of work done by an ideal monoatomic gas to the heat supplied to it in an isobaric process is
- A reaction at 1 bar is non-spontaneous at low temperature but becomes spontaneous at high temperature. Identify the correct...
- A Carnot freezer takes heat from water at 0^ inside it and rejects it to the room at a temperature of 27^ . The latent heat of...
- If 100 mole of H _2 O _2 decompose at 1 bar and 300 K, the work is done (kJ) by one mole of O _2(g) as it expands against 1 bar...
- Given: C(graphite) + O_2(g) CO_2(g) ; _rH^ = -393.5 kJ mol^ -1 ; H_2(g) + 12 O_2(g) H_2O(l) ; _rH^ = -285.8 kJ mol^ -1 ; CO_2(g)...
- The enthalpy change on freezing of 1 mol of water at 5^ to ice at -5^ is: (Given _ fus H = 6 kJ mol^ -1 at 0^ , C_p( H_2O,l ) =...
- Which of the following is correct for C(graphite) + O _2 (gas) CO _2 (gas) , heat =-348 kJ? [OJEE 2006]
- When 10 g of methane is completely burnt, the heat evolved is 560 kJ. What is the heat of combustion (in kJ mol^ -1 ) of methane?
- On combustion of 4 g of methane, 10.46 kJ of heat is liberated. Heat of combustion of methane is
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