Chapter 19

Question 1

Two objects
that are separately in thermal equilibrium with
a third object are in thermal equilibrium with
each other.

Answer 1

Zeroth law of thermodynamics

Question 2

Two objects are defined to have the same

temperature if they are

Answer 2

in thermal equilibrium

with each other

Question 3

5/9 (T in F - 32)

Answer 3

T in C

Question 4

9/5 (T in C + 32)

Answer 4

T in F

Question 5

If you plot a graph with Fahrenheit temperatures
along the horizontal axis and the corresponding
Celsius temperatures along the vertical axis, the
slope of the equal-temperature line will be

Answer 5

0.56 C/F

Question 6

Rankine (R)

Answer 6

F + 459.67

Question 7

As temperature increases, the amplitude

Answer 7

increases, causing the overall

object as a whole to expand.

Question 8

When the

temperature changes by T, the fractional change in length L is

Answer 8

proportional to T.  is called the coefficient of linear expansion.

Question 9

Alpha units

Answer 9

C^-1 and K^-1

Question 10

a nickel steel
alloy notable for its uniquely low
coefficient of thermal expansion

Answer 10

Invar

Question 11

coefficient of areal expansion

Answer 11

Y

Question 12

coefficient of volume expansion

Answer 12

B

Question 13

A sheet of metal has a star shaped hole.
What happens to the distance, d, when the
temperature of the sheet is increased?

Answer 13

Increases

Question 14

consists of two pieces of metal,
with different coefficients of expansion, bonded to
each other.

Answer 14

Bimetallic Strips

Question 15

used to convert a temperature change into

mechanical displacement

Answer 15

Bimetallic Strips

Question 16

Used to increase the magnitude of the displacement in a confined space

Answer 16

Bimetallic Strip Coils

Question 17

As the temperature of water increases from 0ºC to 4 ºC, it

Answer 17

contracts and its density increases

Question 18

Above 4 ºC, water exhibits

Answer 18

the expected expansion with

increasing temperature

Question 19

The maximum density of water is

Answer 19

1000 kg/m3 at 4 ºC

Question 20

How much water spills out of the flask?

Answer 20

Both Volume expansion formulas

Question 21

At what temperature will the bar break?

Answer 21

Y = (F/a) / (dLf / L)

Question 22

Properties of Gases

Answer 22

1. No fixed volume or pressure

2. Expands to fill the container

Question 23

Collection of atoms or molecules that move randomly
– Molecules exert no long-range force on one another
– Molecules occupy a negligible fraction of the volume of their
container

Answer 23

Ideal Gas

Question 24

NA =

Answer 24

6.022 X 10^23 atoms

Question 25

Mass of Atom

Answer 25

Molar mass / NA

Question 26

PV = Constant

Answer 26

Boyles

Question 27

V/T = Constant

Answer 27

Charles

Question 28

P/T = Constant

Answer 28

Gay-Lussac

Question 29

An ideal gas is confined to a container with constant volume.
The number of moles is constant. By what factor will the
pressure change if the absolute temperature triples?

Answer 29

3

Question 30

An ideal gas is confined to a container with adjustable volume.
The number of moles and temperature are constant. By what
factor will the volume change if pressure triples?

Answer 30

1/3

Question 31

A mass of He gas occupies a volume V at
standard temperature and pressure. What volume
is occupied if the mass is halved, the absolute
temperature doubled, and the pressure increased
by a third?

Answer 31

(3/4)V

Question 32

another quantity commonly determined for gas
mixtures. It is defined the number of moles of one substance
relative to the total number of moles in the mixture

Answer 32

Mole Fraction

Question 33

The sum of the partial pressures of the gases in a
mixture = the total pressure, or P = PA + PB + PC + … Pi
where Pi = the partial pressure of component i.

Answer 33

Dalton’s Law