Physics 1 Marks Question

According to this statement, no such process is possible, which can completely convert the entire heat taken from a heat reservoir into work

While filling air in the cycle tube, work done on the air increases the internal energy of the air, due to which the temperature of the air and the pump increases.

Isothermal process, because the temperature remains constant.

Superheating of steam is an isobaric process, because by continuously giving heat to the steam, the temperature of the steam does not remain constant, rather the temperature increases.

A diagram indicating the diagram of P and V of a body is called indicator diagram.

It is a heat engine working in the opposite direction from the refrigerator.

On change in temperature.

(i) Source (ii) Stand (iii) Sink (iv) Working substance.

When the temperature of the sink is absolute zero or the temperature of the source is infinite. Both of these are impossible.

All those working between two equal temperatures reversible engines have the same efficiency.

The efficiency of a reversible engine depends only on the temperature of the source and sink.

Melting of a solid is an isothermal change, because when the solid melts, there is no change in its temperature.

Isobaric process.

If all the heat given to the system is converted into work, then its temperature will not increase, that is, it is possible. This is not against the first law of thermodynamics.

In adiabatic change the value of specific heat of gas is zero, because dQ = 0.

Internal energy of gas will be maximum and internal energy of solid will be minimum.

No, if they intersect each other then the pressure and volume of the gas will be the same for two different temperatures at the intersection point, which is not possible.

Yes, by changing the quantity of gas.

It is impossible to continuously achieve work by continuously obtaining heat from a system and reducing its temperature from the ambient temperature (Kelvin's statement). It is impossible for heat to flow automatically from a system of lower temperature to a system of higher temperature (statement of Clausius).

In the reversible Carnot engine, ideal gas is used as the working substance.

(i) The change of state in the process should happen very slowly. (ii) The difference between the pressure and temperature of the liquid of the system and the pressure and temperature of the surroundings should not be much. (iii) Heat should not be lost due to friction, viscosity, radiation etc.

If in any process, the changes in the external states are applied in the opposite order or opposite direction with respect to the direct process, the same state is obtained at every level, as in the direct process. If this process takes place then it is a reversible process.

The internal energy of an ideal gas depends only on temperature; hence it has zero. There is no change.

The slope of the post-inhibitory curve is higher.

(i) It should have a source of infinite heat capacity.
(ii) It should have access to an infinite heat capacity.

No, it is an ideal heat engine.

Since there is no access in the ship, so the internal energy of water cannot be used to run the engine.

The energy due to the movement of molecules in a gas is called internal energy. It is made up of kinetic energy, vibrational energy, rotational energy etc. of molecules.

Internal energy will remain unchanged.

In isothermal process, since dU = 0 in this process.

No, because internal energy depends only on the initial and final states and not on the path

true

Zero

Zero

false