Lecture 1

Question 1

can be defined as the
science of energy.

Answer 1

Thermodynamics

Question 2

can be viewed as the ability to
cause changes

Answer 2

Energy

Question 3

during an interaction, energy
can change from one form to
another but the total amount of
energy remains constant. That
is, energy cannot be created
or destroyed.

Answer 3

Conservation of Energy
Principle

Question 4

asserts that energy has quality as well as
quantity, and actual processes occur in
the direction of decreasing quality of
energy.

Answer 4

second law of thermodynamics

Question 5

study of thermodynamics that* does not require a
knowledge* of the behavior of individual
particles

Answer 5

classical thermodynamics

Question 6

based on the average behavior of large groups of
individual particles

Answer 6

statistical thermodynamics

Question 7

Any physical quantity can be
characterized by ____________

Answer 7

dimensions

Question 8

The magnitudes assigned to the
dimensions are called __________

Answer 8

units

Question 9

basic dimensions such as mass m,
length L, time t, and temperature T

Answer 9

primary or fundamental dimensions

Question 10

expressed in terms of the primary dimensions ex. velocity, energy, volume

Answer 10

secondary dimensions or derived
dimensions

Question 11

which is also known as the United States Customary System (USCS)

Answer 11

English system

Question 12

(from Le Système International d’
Unités) also known as the International
System

Answer 12

metric SI

Question 13

The unit for time rate of energy is joule per second (J/s), which is called a

Answer 13

watt (W).

Question 14

In the case of work, the time rate
of energy is called

Answer 14

power

Question 15

In engineering, all equations must be _________________. That is, every term in an equation must have the same unit. If, at some stage of an analysis, we find ourselves in a position to add two quantities that have different units, it is a clear indication that we have made an error at an earlier stage

Answer 15

Dimensional Homogeneity

Question 16

is defined as a quantity of matter or a region in space chosen for study.

Answer 16

A system

Question 17

The mass or region outside the system is
called the

Answer 17

surroundings

Question 18

The real or imaginary surface that separates the system from its surroundings is called the

Answer 18

boundary

Question 19

(also known as a control mass or just system when the context makes it clear) consists of a fixed amount
of mass, and no mass can cross its boundary

Answer 19

A closed system

Question 20

as it is often called, is a properly selected
region in space. It usually encloses a device that involves mass flow such as a compressor, turbine,
or nozzle.

Answer 20

control volume

Question 21

as a special case, even energy is not
allowed to cross the boundary, that
system is called an

Answer 21

isolated system.

Question 22

Any characteristic of a system Pressure P, temperature T, volume V, mass

Answer 22

Property

Question 23

those that are independent of the mass of the* system*

Answer 23

Intensive properties

Question 24

values depend on the size or* extent of the
system*

Answer 24

Extensive properties

Question 25

extensive properties per unit mass

Answer 25

Specific Properties

Question 26

weight of a unit volume of a substance

Answer 26

specific weight

Question 27

condition of the system At a given state, all the properties of a system have* fixed values*. If the value of even one property changes, the state will change
to a different one.

Answer 27

state

Question 28

the temperature is the same throughout the entire
system

Answer 28

Thermal equilibrium

Question 29

related to pressure; no change in pressure at any
point of the system with time

Answer 29

Mechanical equilibrium

Question 30

when the mass of each phase reaches an equilibrium level and stays there

Answer 30

phase equilibrium

Question 31

chemical composition does not change with time,
that is, no chemical reactions occur

Answer 31

chemical equilibrium

Question 32

The state of a simple compressible
system is completely specified by two
independent, intensive properties.

Answer 32

The State Postulate

Question 33

Any change that a system
undergoes from one equilibrium state to
another

Answer 33

Process

Question 34

series of states through which a system passes during a process

Answer 34

path of the process

Question 35

a process proceeds in such a manner
that the system remains infinitesimally
close to an equilibrium state at all times

Answer 35

(quasi-equilibrium)

Question 36

used to designate a process for which a particular property remains constant

Answer 36

iso

Question 37

example, is a process during which the
temperature T remains constant

Answer 37

isothermal process

Question 38

is a process during which the pressure P
remains constant

Answer 38

isobaric process

Question 39

during which the specific
volume v remains constant

Answer 39

isochoric (or isometric) process

Question 40

implies no change with time

Answer 40

steady

Question 41

opposite of
steady

Answer 41

unsteady

Question 42

implies no change with location
over a specified region

Answer 42

uniform

Question 43

a process during which a fluid flows through a control
volume steadily

Answer 43

steady-flow process

Question 44

states that if two bodies are in thermal equilibrium with a third body, they are also in thermal equilibrium with each

Answer 44

zeroth law of thermodynamics

Question 45

is defined as a normal force exerted by a fluid
per unit area

Answer 45

Pressure

Question 46

The counterpart of pressure in solids is

Answer 46

normal stress

Question 47

The actual pressure at a given position is called the

Answer 47

absolute pressure,

Question 48

Atmospheric pressure is measured
by a device called a

Answer 48

barometer