Laws of Thermodynamics Physics - Laws of Thermodynamics

An ideal gas goes from the state i to the state fas shown in figure. The work done by the gas during the process:

1. Is positive.
2. Is negative.
3. Is zero.
4. Cannot be obtained from this information.

The internal energy of an ideal gas decreases by the same amount as the work done by the system:

1. The process must be adiabatic.
2. The process must be isothermal.
3. The process must be isobaric.
4. The temperature must decrease.

In a process on a system, the initial pressure and volume are equal to the final pressure and volume.

1. The initial temperature must be equal to the final temperature.
2. The initial internal energy must be equal to the final internal energy.
3. The net heat given to the system in the process must be zero.
4. The net work done by the system in the process must be zero.

The first law of thermodynamics is a statement of:

1. Conservation of heat.
2. Conservation of work.
3. Conservation of momentum.
4. Conservation of energy.

Should the internal energy of a system necessarily increase if its temperature is increased?

Can work be done by a system without changing its volume?

A force F is applied on a block of mass M. The block is displaced through a distance d in the direction of the force. What is the work done by the force on the block? Does the internal energy change because of this work?

Should the internal energy of a system necessarily increase if heat is added to it?

When we heat an object, it expands. Is work done by the object in this process ? Is heat given to the object equal to the increase in its internal energy?

Calculate the change in internal energy of a gas kept in a rigid container when 100J of heat is supplied to it.

A cylinder containing a gas is lifted from the first floor to the second floor. What is the amount of work done on the gas? What is the amount of work done by the gas? Is the internal energy of the gas increased? Is the temperature of the gas increased?

An ideal gas is pumped into a rigid container having diathermic walls so that the temperature remains constant. In a certain time interval, the pressure in the container is doubled. Is the internal energy of the contents of the container also doubled in the interval?

A closed bottle contains some liquid. The bottle is shaken vigorously for 5 minutes. It is found that the temperature of the liquid is increased. Is heat transferred to the liquid? Is work done on the liquid? Neglect expansion on heating.

When a tyre bursts, the air coming out is cooler than the surrounding air. Explain.

When we rub our hands they become warm. Have we supplied heat to the hands?