EASY
Diploma
IMPORTANT
Earn 100

Write a balanced chemical equation, and predict products for the following process:

Catalytic reforming of heptane into methylbenzene.

Important Questions on Energy

EASY
Diploma
IMPORTANT

Write balanced chemical equation, and predict products for the following process:

Liquefaction of synthesis gas, CO and H2 to produce liquid heptane.

EASY
Diploma
IMPORTANT

Calculate the mass of carbon dioxide produced per gram of the ethanol burned. Give the value approximated to two decimal places.

EASY
Diploma
IMPORTANT

Calculate the mass of carbon dioxide produced per gram of the methane burned. Give the value approximated to two decimal places.

EASY
Diploma
IMPORTANT

Calculate the mass of carbon dioxide produced per gram of 2,2,4-trimethylpentane burned. Give the value approximated to two decimal places.

MEDIUM
Diploma
IMPORTANT

The enthalpies of combustion of the three fuels are:

ethanol -1367 kJ mol-1; methane -891 kJ mol-12,2,4-trimethylpentane -5460 kJ mol-1

Calculate the energy released in burning 1 g (the specific energy) of each fuel.

MEDIUM
Diploma
IMPORTANT

The 

Fuel Mass of CO2 (in grams) produced
per gram of fuel 
Energy (in kJ) released 
per gram

Ethanol

1.91 29.7
Methane 2.75 55.7
2,2,4-Trimethylpentane 3.08 47.9

Discuss the advantages and disadvantages of each fuel and the problems faced by society in using "green" fuels.

EASY
Diploma
IMPORTANT

Complete the following nuclear equation. Also, choose an appropriate description: alpha / beta; capture / decay.

I53131  __ + e-10

EASY
Diploma
IMPORTANT

Complete the following nuclear equation. Also, choose an appropriate description: alpha / beta; capture / decay.

Xe54118 + __   I53118