Write down the general formula of alkenes.
Explain why larger alkane molecules need to be cracked.
Describe the two conditions required for cracking.
Alkenes are unsaturated compounds. State what the term unsaturated means.
Predict the boiling point of propene.
Deduce the physical state of butene at $-100^\circ\text{C}$. Give a reason for your answer.
State how the volume of ethene in the gas syringe changes when the temperature is lowered and the pressure stays the same.
State what is meant by exothermic.
Explain how this reaction pathway diagram shows that the reaction is exothermic.
Finish the symbol equation for this reaction.\n\n$\text{C}_2\text{H}_4 + [BLANK] \rightarrow [BLANK]$
Choose the word that names the type of catalyst used in this reaction.