Heat and Temperature

Question 1

The measurement of the average kinetic energy of the substance being measured is ______.

Answer 1

temperature

Question 2

______ is a quantity that causes an _______in the temperature of a body when it is added to the body and a _________ in temperature when it is removed from a body.

Answer 2

Heat

increase

decrease

Question 3

Heat energy is always transferred from an area of _____ temperature to an area of _____ temperature regardless of the total energy in either area.

Answer 3

higher to lower

Question 4

The _______ is the amount of energy in calories required to raise the temperature of one gram of the substance by 1 C.

Answer 4

specific heat

Question 5

_____ is used as the standard and its specific heat is ____calorie/(gram Celcius)

Answer 5

Water

1

Question 6

specific heat of ice

Answer 6

0.5 calories/(gram ºC)

Question 7

Heat fusion of ice equals _______.

Heat fusion is defined as:

Answer 7

80 calories/gram

The energy required to change one gram of ice at 0ºC to one gram of water at 0ºC.

Question 8

heat energy equation

Answer 8

Q = MC►T

• Q = energy in calories
• C = specific heat

Question 9

heat vaporization of water at 100 ºC

Answer 9

540 calorie/gram

Question 10

specific heat of steam

Answer 10

0.5 calorie/(gram ºC)

Question 11

Heat is transferred in 3 ways:

Answer 11

• Conduction
• Radiation
• Convection

Question 12

The principle method of heat transfer in solids

Answer 12

conduction

Question 13

The principle method of heat transfer in liquids and gases:

Answer 13

convection

Question 14

The means by which thermal energy is transferred by electromagnetic waves

Answer 14

radiation

Question 15

Automobile engines incorporate a pump to circulate or force the water from the bottom of the radiator to the water jacket of the engine. This is an example of ______ __________.

I.e. there is some sort of pump used to force the fluid along.

Answer 15

forced convection

Question 16

The rate at which an object radiates energy is a function of the ______ ______ of the object.

Answer 16

absolute temperature

Question 17

Energy equation assuming we only have radiative processes is called the ______ _______ equation

Answer 17

Stefan Boltzmann

E = eσ (T1^4 - T2^4)

σ = 4.8 * 10^-8

Question 18

When heat evaporates, it extracts the heat of vaporization from the skin.

This heat of vaporization is about _____cal/gram at normal BT.

Answer 18

580

Question 19

The molecular weight of air is:

Answer 19

28.9

Question 20

Total heat lost via respiration is _____.

Answer 20

200 cal/min

Question 21

The fixed point that which ice, liquid, and water vapor exist in equilibrium is called the _____ _____ of water.

Answer 21

triple point

Question 22

The water vapor pressure at the triple point is _______mmHg.

Answer 22

4.58 mmHg

Question 23

The temperature at the triple point of water is _______ Kelvin.

Answer 23

273.16 Kelvin or 0.01ºC

Question 24

The temperature at which steam and liquid water are in equilibrium is _____ºC

Answer 24

100ºC

Question 25

Addition of heat energy to a body can cause various affects such as (2):

Answer 25

volume expansion

change of phase

Question 26

Heat loss from the body by radiation is exemplied by the _______ ______ ____.

E= eσ(T1^4- T2^4 )

Answer 26

Stefan Boltzmann Law

Question 27

Body heat loss by radiation, convection, evaporation, respiration:

Answer 27

• 40%
• 30%
• 20%
• 10% (8% evaporation of water, 2% heating of air)