Thermal Expansion and Stress

Question 1

The increase in dimensions of a material as a consequence of temperature change

Answer 1

Thermal Expansion

Question 2

The material _____ when the temperature reduce

Answer 2

Contracts

Question 3

Condition for small temperature variations

Answer 3

Change in Length is Directly Proportional to Change in Temperature

Question 4

the unusual behavior of water

Answer 4

Most liquids expands at high temperature but water also expands in lower temperature as it approach to freezing point

Question 5

water contracts from

Answer 5

0 to 4 C (density increases)

Question 6

density of water is max at

Answer 6

4 C (1 g/cm^3)

Question 7

Due to expansion or contraction of a material, there exist ___, and it is the force acting per unit area

Answer 7

Thermal Stress

Question 8

Hooke’s Law

Answer 8

within the elastic range of the material, when the material expands, the change in length is proportional to the force applied. Stress is proportional to the strain.

Question 9

Modulus Elasticity is also called

Answer 9

Young’s Modulus

Question 10

unit of Heat

Answer 10

Joule / Calorie

Question 11

amount of heat required to raise the temperature of 1 gram of water by 1 C from 14.5 C to 15.5 C

Answer 11

Calorie

Question 12

The sum of all the microscopic forms of energy of the consistent atoms and molecules of a system

Answer 12

Internal Energy

Question 13

According to ____, doing work on water increases its internal energy and the increase in internal energy would result to a rise of temperature

Answer 13

James Prescott Juole

Question 14

1 cal is equals to

Answer 14

4.186 J

Question 15

Means measuring heat. Its concerned with the heat calculations involved in various physical changes

Answer 15

Calorimetry

Question 16

The heat required to change the temperature of a given mass of a pure substance

Answer 16

Sensible Heat

Question 17

energy per unit mass required to change the temperature of a given substance by 1 C. Measure of how thermally insensitive a substance is to the addition of energy.

Answer 17

Specific heat

Question 18

transition from one state of matter to another is called

Answer 18

Phase change

Question 19

The specific energy necessary to change the phase of a substance at a definite temp is called

Answer 19

Latent Heat

Question 20

Internal energy includes:

Answer 20

Kinetic Energy, Vibrational Potential Energy, Electric Potential Energy

Question 21

Latent Heat of Fusion (Lf) for water is equivalent to

Answer 21

Lf = 80 cal/g = 334J/g = 144 BTU/lb

Question 22

Latent Heat of Vaporization (Lv) for water is equivalent to

Answer 22

Lv = 540 cal/g = 2260 J/g = 970 BTU/lb