A cold reservoir is touched to a system, which of the following may happen?

When there is no heat exchange between the system and the reservoir, ____.

1. The system is said to have enough heat
2. The reservoir is said to have enough heat
3. The system and the reservoir are said to be in thermal equilibrium
4. The system is not connected to the reservoir

The internal energy of a system does not change in a/an _____ process.
(A) Isothermal
(B)  Adiabatic
(C)  Isochoric
(D)   Isobaric

1. A and C
2. A and B
3. B and D
4. All of them

Energy can be added to a system by ____.

1. Work
2. Heat
3. Both a and b
4. None

Internal energy denotes ______.

1. Kinetic energy
2. Potential energy
3. Electrostatic energy
4. Sum of all of the above

When the pressure inside the system is smaller than the pressure outside it, the work is done ______.

1. By the system
2. On the system
3. On the surrounding
4. All of the above

During a thermodynamic process, 540 J of heat is removed from a gas system while 1200 J of work done on the gas. The change in internal energy of a system is _______J.

During a thermodynamic process, 230 joules of heat are added to a gas while 200 joules of work are done by the gas. The change in internal energy of a system is ______ J.

During an isothermal process 200 J of heat are removed from a trapped gas. The work is done _______.

1. By the gas
2. On the gas
3. On the surrounding
4. None

A hot reservoir is touched to a system, which of the following may happen?

1. The heat flows from the system to the reservoir
2. The internal energy of the system decreases
3. None of the above
4. All of the above

When the pressure inside the system is greater than the pressure outside it, the work is done ______.

1. By the system
2. On the system
3. By the surrounding
4. All of the above

When two systems 1 and 2 are in thermal equilibrium, _______

1. Heat flows from 1 to 2
2. Heat flows from 2 to 1
3. Heat does not flow at all
4. Heat first flows from 1 to 2 then from 2 to 1

When the heat is removed from a system, its internal energy _____.

1. Increases
2. Decreases
3. Remains the same
4. None 

________ is an invisible transfer of energy into or out of a system.

1. Heat
2. Light
3. Work
4. Pressure

Heat is added or removed from a system by _____.

1. Movement of the system
2. Lifting the whole system up
3. Touching it with a heat reservoir
4. Putting the whole system down

When the system is touched to a hot reservoir its internal energy _____.

1. Increases
2. Decreases
3. Stays the same
4. None