Quiz Week 1: Thermodynamics Basics

What differentiates a closed system and an open system?

• Flow of energy

• Flow of mass

• Flow of heat

• Flow of pressure

Answer explanation

An open system has mass flowing in and out of the system. There is no mass flow into and out of a closed system.

This type of fluid property is dependent on the size of the system. Examples are mass m, volume V, and total energy E.

• Intensive properties

• Specific properties

• Extensive properties

Select intensive properties from the list below

• Pressure

• Volume

• Temperature

• Density

• Specific volume

The "state postulate" prescribes that to completely determine the state of a (compressible) system, we need _____ independent intensive properties.

• 0

• 1

• 2

• 3

A system will be in equilibrium only when which of the following type of equilibrium is/are satisfied?

• Thermal equilibrium

• Mechanical equilibrium

• Chemical equilibrium

• Phase equilibrium

Answer explanation

Equilibrium is when every below are achieved:

1. thermal equilibrium (heat),

2. Mechanical equilibrium (pressure),

3. Phase equilibrium, and

4. chemical equilibrium (chemical reactions)

Which of the following is true about the term "quasi-equilibrium"?

• An extremely slow process where the the system remains extremely close to equilibrium state at all times

• Work-producing devices has the highest efficiency under quasi-equilibrium conditions

• It is an ideal process and not a true representation of actual process

• All of the above

Select the correct process with constant properties below:

(P=Pressure; T=Temperature; V=Volume)

• Isothermal process: constant T

  Isobaric process: constant P

  Isometric process: constant V

• Isothermal process: constant V

  Isobaric process: constant T

  Isometric process: constant P

• Isothermal process: constant V

  Isobaric process: constant P

  Isometric process: constant T

• I am seriously confused at this point

What is the fundamental principle of thermodynamics?

• Energy is conserved

• Energy cannot be created or destroyed

• Energy changes from one form to another, but the total energy remains constant

• All of the above