- [Medium]During each cycle a heat engine draws 800 J from its hot reservoir and discharges 600 J into the cold surroundings. What is the thermal efficiency of ...
- [Medium]A domestic refrigerator extracts 360 J of heat from the food compartment for every 120 J of electrical work its compressor consumes per cycle. What is...
- [Easy]A rigid steel container holds a fixed amount of gas that is heated by a hot plate so its pressure rises sharply. How much work is done by the gas duri...
- [Medium]A 200 g copper block at 100 °C is dropped into 300 g of water at 20 °C inside an insulated cup. Given copper's specific heat is $0.39\text{ J g}^{-1}\...
- [Medium]Within an insulated cylinder a diatomic gas at 300 K is compressed adiabatically until its volume becomes one-fourth of the original. Using $\gamma=1....
- [Medium]Operating between a boiler at 600 K and a condenser at 300 K, an ideal reversible engine runs through a complete Carnot cycle. What is the maximum pos...
- [Medium]On a pressure-volume diagram a gas is taken around a closed rectangular loop in the clockwise sense, returning exactly to its starting state. What is ...
- [Easy]For one mole of an ideal gas the molar specific heat at constant pressure always exceeds the molar specific heat at constant volume. What does this co...
- [Medium]Maintained in a water bath at constant temperature, two moles of an ideal gas expand slowly until the volume doubles at 300 K. Taking $R=8.31\text{ J ...
- [Easy]Inside a frictionless piston the gas expands from a volume of 2.0 litres to 5.0 litres while the surrounding atmosphere keeps the pressure steady at $...
- [Medium]An inventor claims a machine that, working in a cycle, absorbs heat from a single reservoir and converts all of it entirely into mechanical work with ...
- [Easy]An insulated chamber lets a sample of ideal gas expand freely into an adjoining vacuum with no piston to push and no heat exchange. What happens to th...
- [Medium]Treating a rigid diatomic gas molecule with only translational and rotational motion active, what value does the ratio of specific heats $\gamma$ take...
- [Medium]Compressed suddenly inside an insulated pump, a monatomic gas has work of 150 J performed on it while no heat escapes through the walls. How does its ...
- [Easy]Two blocks A and B are each found to be in thermal equilibrium with a third block C, yet A and B are never placed in direct contact with each other. W...
- [Easy]A sealed cylinder of gas absorbs 250 J of heat from a flame while the expanding gas performs 90 J of work on its piston. By how much does the internal...
- [Easy]Entropy change in reversible process is:...
- [Easy]Zeroth law establishes concept of:...
- [Easy]First law expresses conservation of:...
- [Medium]According to the Second Law of Thermodynamics, which of the following processes are forbidden?...
- [Easy]Molar heat capacity at constant volume C_v for ideal monoatomic gas equals:...
- [Easy]Ratio C_p/C_v for ideal monoatomic gas is:...
- [Medium]For ideal gas, adiabatic curve compared to isothermal is:...
- [Easy]Carnot efficiency depends only on:...
- [Hard]Entropy of isolated system during real (irreversible) process:...
- [Medium]Work done in a quasi-static process equals area under curve in:...
- [Hard]For adiabatic expansion of ideal gas, relation between T and V is:...
- [Medium]For ideal gas free expansion into vacuum: work and internal energy change are:...
- [Hard]Heat engine absorbs Q_h and rejects Q_c per cycle. Efficiency is:...
- [Medium]Coefficient of performance of refrigerator is defined as:...
- [Hard]One Maxwell relation from fundamental thermodynamic potential U(S,V) is:...
- [Easy]A Carnot engine works between temperatures 27°C and 127°C. The efficiency of the engine is:...