EASY
Diploma
IMPORTANT
Earn 100
Explain why the temperature of a boiling liquid does not increase despite energy being constantly applied.
Important Questions on Stoichiometric Relationships
EASY
Diploma
IMPORTANT
Deduce which would be more painful, scalding your skin with water vapour or boiling water.
EASY
Diploma
IMPORTANT
Explain why you might feel cold and shiver when you get out of the water at the beach on a very hot, windy day.
EASY
Diploma
IMPORTANT
Write equation for the following chemical reaction, including state symbols.
Zinc metal reacts with hydrochloric acid to form the salt zinc chloride. Hydrogen gas is evolved.
EASY
Diploma
IMPORTANT
Write equation for the following chemical reaction, including state symbols.
Hydrogen gas and oxygen gas react together to form water.
EASY
Diploma
IMPORTANT
Write equation for the following chemical reaction, including state symbols.
At a high temperature, calcium carbonate decomposes into calcium oxide and carbon dioxide.
EASY
Diploma
IMPORTANT
Suggest why even if a chemical reaction has a yield close to , the atom economy may be poor. Carry out some research into this aspect.
EASY
Diploma
IMPORTANT
Discuss some other ways a chemical process may be evaluated other than the atom economy, eg energy consumption etc.
EASY
Diploma
IMPORTANT
Deduce the percentage atom economy for the nucleophilic substitution reaction:
