Tutor Physic - Thermodynamic

Identify intensive (intrinsic) properties:

• Volume, mass, size

• Boiling point, temperature, volume

• Boiling point, temperature, color

• Length, temperature, mass

First law of thermodynamics deals with _______

• Conservation of energy

• Conservation of mass

• Conservation of momentum

• Conservation of pressure

According to First law of thermodynamics, ......

• total internal energy of a system during a process remains constant

• work done by a system is equal to the heat transferred by the system

• total energy of a system remains constant

• internal energy, enthalpy and entropy during a process remains constant

An ideal gas undergoes the process below. The work done by the gas is

• + 2PoVo

• - 2PoVo

• + 4 PoVo

• - 4PoVo

A system absorbs 50 J of heat and does 11 J of work in a process. The system follows a different path between the same initial and final states and does 15 J work, the heat transferred in the process is:

• 39 J

• 65 J

• 54 J

• 46 J

Two cylinders A and B of equal capacity are connected to each other via a stopcock. A contains gas at a standard temperature and pressure. B is completely evacuated. The entire system is thermally insulated. If the stopcock is suddenly opened, then the change in internal energy of the gas is:

• 5 J

• 15 J

• 0

• 10 J

The change internal energy in a cyclic process is ___________

• Zero

• Unity

• Infinity

• Constant

If 315 cal of heat is given to the system, and the system does 20cal of work, find the change in internal energy

• 0 cal

• 335 J

• 335 cal

• 295 cal

Work done on a system is ________, and heat flow into of the system is ________

• Negative, negative

• Positive, positive

• Positive, negative

• Negative, positive

The latent heat of vaporisation of water is 2,240 J. If the work done in the process of vaporisation of 1g is 168 J, then the increase in internal energy is?

• 1036 J

• 2072 J

• 2408 J

• 4144 J