Chain, energy and resources past paper corrections

Question 1

Definition of homologous series

Answer 1

A series of compounds that have the same functional group but each subsequent member differs by CH2

Question 2

What is the equation for the production of ethanol from yeast?

Answer 2

Glucose —-> ethanol + CO2

Question 3

What is the name of the type of reaction of alcohol to alkene?

Answer 3

Dehydration

Question 4

When working out enthalpy change with Q = mc/\T, what does m stand for and what else can it be?

Answer 4

Mass of the liquid solvent and if it says density = 1 gcm-3 then you can use the volume

Question 5

What are the labels of the axis in the bolzmann distribution?

Answer 5

Number of molecules and the energy

Question 6

What are two sources of nitrogen oxides in the stratosphere?

Answer 6

Thunderstorms

Aircrafts

Question 7

What are the two factors that change the greenhouse effect of a gas in the atmosphere?

Answer 7

The amount it absorbs and reflects INFRARED

The abundance of gas in the atmosphere

Question 8

What does E isomer mean?

Answer 8

Opposite

Question 9

WHat does Z isomer mean?

Answer 9

The same side

Question 10

What is another way of describing the difference between E/Z isomers

Answer 10

Each carbon is attached to two different groups

Question 11

How many H2O molecules are produced in the equation of oxidation of alcohols?

Answer 11

ONE

Question 12

How is NO produced from cars?

Answer 12

N2 + O2 —> 2NO

C8H18 + 10.5 O2 —–> 4CO + 4CO2 + 9 H2O

Question 13

How do catalytic converters work?

Answer 13

CO and NO are adsorbed onto the surface of the catalytic converter
Activation energy decreases
Bonds weaken
2CO + 2NO ----> 2CO2 + N2
CO2 and N2 desorb from the surface