week 7 energy

Question 1

Energy

Answer 1

The capacity to do work

Question 2

Work

Answer 2

measurement of the total internal energy

Question 3

law of conservation of energy

Answer 3

Can’t be created or destroyed only transformed

Question 4

2 law of Thermodynamics

Answer 4

Natural Processes lead to spatial homogeneity of matter and energy

Question 5

What happens to entropy when temperature approaches 0

Answer 5

Entropy approaches a constant value

Question 6

Types of Energy

Answer 6

Potential Kinetic

Question 7

Units of Energy

Answer 7

J Joule
1J is the amount of energy required to apply 1N of force over a distance of 1M

Question 8

Entropy

Answer 8

Disorder in the system
- universe wants disorder-

Question 9

Enthalpy

Answer 9

Measure of total

Question 10

Exothermic

Answer 10

Energy is transferred from the system into the surroundings
Delta H negative (System net loss of energy)

Question 11

Endothermic

Answer 11

Energy transferred from surroundings into the system
Delta H positive (System net gain of energy)

Question 12

Exergonic

Answer 12

Energetic and spontanrous

Question 13

Endergonic

Answer 13

Requires energy and not spontaneous

Question 14

Delta H

Answer 14

Change in enthalpy (a measure of total energy)

Question 15

Activation energy

Answer 15

Energy peak/barrier required for the reaction to occur

Question 16

Gibbs Free Energy

Answer 16

Energy Present in a System
- an indicator of spontaneity

Delta G = Delta H (Enthalpy) - T (temp) . Delta S (Entropy)

Delta G must be negative to be spontaneous
Delta S positive
Delta H negative

Question 17

Delta S

Answer 17

Change in Entropy ( difference between order and chaos, how spontaneous a reaction is)

Question 18

How to make a reaction more spontaneous

Answer 18

Enzymes lower activation energy to create scenarios where the reaction is favourable

Question 19

λ (lambda)

Answer 19

Wavelength

Question 20

Beer-Lambert Equation

Answer 20

A=E l C

A - Absorbance
E - Molar extinction coefficient (mol^-1cm^-1
l - Path Lentgh (cm)
C - Concentration (M) or (mol/L)