Thermodynamic fundamentals

The first law of thermodynamics is a restatement of the

• Zeroth law of thermodynamics

• law of heat addition

• principle of entropy

• conservation of energy

Which best describes ENTROPY?

• Useful heat energy needed to drive an engine

• Heat that can be stored to be used at a later date

• Degree of disorder of a state

• A state of order in a physical system

Which statement is true about the ENTROPY?

• Entropy refers to disorder, the unusable portion that escapes from a system

• Entropy refers to the balance of temperature among two or more systems

• Entropy refers to the average kinetic energy of the molecules

• Entropy refers to the inability to destroy or create energy

True or False? The First Law of Thermodynamics states that the total energy output is equal to the total amount of energy supplied.

• True

• False

A system is in thermodynamic equilibrium

• if temperature and pressure at all points are same

• if temperature and pressure at all points are not same

• if temperature at all points are same

• if pressure at all points are same

Which of the following is an intensive property of a thermodynamic system ?

• Volume

• Temperature

• Mass

• Energy

In an open thermodynamic system,

• heat can be transferred

• work can be done

• mass can be transferred

• all of the above

• none of the above

When two bodies are in thermal equilibrium with a third body, they are also in thermal equilibrium with each other. This statement is called

• Zeroth law of thermodynamics

• First law of thermodynamics

• Second law of thermodynamics

• Kelvin Planck’s law

The value of one bar (in SI units) is equal to

• 100 N/m²

• 1000 N/m²

• 1 × 10⁴ N/m²

• 1 × 10⁵ N/m^2

• 1 × 10⁶ N/m²

As a system becomes more disordered, entropy

• remains the same

• increases

• decreases

• cannot be determined