Chemistry Test #5

Question 1

Energy

Answer 1

Ability to do work

Question 2

Kinetic Energy

Answer 2

Energy in motion

Question 3

Potential Energy

Answer 3

Stored energy

Question 4

Measuring heat energy

Answer 4

Joule/calorie

Question 5

1 food calorie

Answer 5

1000 calories = 1 kilocalorie

Question 6

calorie

Answer 6

amount of heat needed to raise 1 gram 1 degree celsius

Question 7

Heat can be measured using a

Answer 7

calorimeter

Question 8

temperaturer

Answer 8

average kinetic energy of particles

Question 9

exothermic process

Answer 9

heat is released from the system into the surroundings

Question 10

endothermic process

Answer 10

heat is absorbed from the surroundings into the system

Question 11

more energy is released

Answer 11

exothermic

Question 12

more energy is absorbed

Answer 12

endothermic

Question 13

which way does heat flow

Answer 13

area of higher temperature to are of lower temperaturer

Question 14

Absolute Zero (Kelvin):

Answer 14

-273K

Question 15

Heating Curve

Answer 15

Solid, Melting, Liquid, Boiling, Gas

Question 16

Flat Pat of Curve

Answer 16

Kinetic energy remains constant, potential energy increases as molecules spread apart

Question 17

Rising Part of Curve

Answer 17

Kinetic Energy Remains contast, pE stays the same

Question 18

Cooling Curve

Answer 18

Exothermic
Gas, Condensation, Liquid, Freezing, Solid

Question 18

Condensation/Freezing

Answer 18

KE Constant, PE decreasing
Molecules move closer as intermolecular forces are formed

Question 19

measures pressure that gases exert

Answer 19

barometer

Question 19

standard pressure

Answer 19

1 ATM, or 101.3 kiloPascal

Question 20

Kinetic Molecular Theory of Gases

Answer 20

indefinite volume & shape
spread far apart
move in straight line motion
net energy is conserved
volume of particles insignificant to amt of space occupied
no forces of attraction

Question 21

temperature & pressure relationship

Answer 21

If pressure increases, volume decreases
If pressure decreases, volume increases

Question 22

Real Gas Particles:

Answer 22

small volume
some attraction for each other

Question 23

least ideal conditions

Answer 23

low temp, high pressure
turns gases into liquids; weak intermolecular forces will come into play

Question 23

most ideal conditions

Answer 23

low pressure, high temperature
nonexistant attractive forces
far apart (like helium and hydrogen)

Question 24

Avogadro’s Hypothesis

Answer 24

equal volumes of gases at the same temperature and pressure contain the same number of particles (molecules)

Question 25

John Dalton: Partial Pressure of Gases

Answer 25

Total Pressure = sum of partial pressures

Question 26

Sublimation

Answer 26

solid phase to a gas phase

Question 27

Deposition

Answer 27

gas phase to solid phase

Question 28

ice to water

Answer 28

heat of fusion

Question 29

same temp and pressure

Answer 29

same density

Question 30

as temperature increases,

Answer 30

vapor pressure increases

Question 31

the weaker the force of attraction between the particles in a liquid,

Answer 31

the lower the energy level required to overcome it

Question 32

absolute zero

Answer 32

-273C
0K

Question 33

as molecules move apart

Answer 33

PE increases

Question 34

when is the boiling point reached

Answer 34

when vapor pressure equals atm pressure