Lecture 8

Question 1

Thermochemical equation

Answer 1

A balanced equation that includes ΔHrxn

Question 2

Hess’s law

Answer 2

States that the Enthalpy change of an overall process is the sum of the Enthalpy changes of its individual steps

Question 3

Equation for the speed of light

Answer 3

c = λ * v

Question 4

speed of light

Answer 4

3.00 X 10^8

Question 5

Frequency

Answer 5

Number of cycles a wave undergoes per second (s- or Hz)

Question 6

Wavelength

Answer 6

Distance between to peaks or troughs (in nm)

Question 7

Low energy vs high energy wavelength

Answer 7

Low = waves as spread apart
High = waves are close together

Question 8

Amplitude

Answer 8

Related to the intensity of the wave radiation

Question 9

Electromagnetic spectrum

Answer 9

High
Gamma rays
X-rays
Ultraviolet
Visible
Infrared
Microwaves
Radio waves
Low

Question 10

Planck radiation law

Answer 10

E = hv = hc/λ

Question 11

Planck constant

Answer 11

6.626 X 10^-34 J*s

Question 12

Quantum

Answer 12

Fixed quantity of energy

Question 13

Visible light

Answer 13

A type of electromagnetic radiation

Question 14

Speed

Answer 14

Distance it moves per unit time (m/s)

Question 15

Standard heat of formation

Answer 15

Enthalpy change for the chemical reaction when 1 mol if a compound in its standard state is produced from its component elements in their standard states

Question 16

Standard state

Answer 16

A set of specific conditions used to compare thermodynamic data; indicated by a superscript zero on the thermodynamic symbol

Question 17

Higher amplitude

Answer 17

Brighter light

Question 18

Transition between types of light is

Answer 18

Fluid- there is not clean distinction

Question 19

Refraction

Answer 19

Change in direction of light wave when passing boundary between materials (the way light refracts into water)

Question 20

Diffraction

Answer 20

Light wave bends around edge of opening in object (bends around both edges of a small opening forming a semicircular wave)