JAMB Chemistry questions: Energy changes

22 questions with answers and explanations. Tap an option to check yourself.

All topics Acids, bases and salts · 32 Air · 21 Atomic structure and bonding · 33 Chemical combination · 31 Chemical equilibrium · 21 Chemistry and industry · 18 Electrolysis · 22 Energy changes · 22 Environmental pollution · 17 Kinetic theory of matter and gas laws · 27 Metals and their compounds · 24 Non-metals and their compounds · 23 Organic compounds · 43 Oxidation and reduction · 22 Rates of chemical reaction · 22 Separation of mixtures and purification · 24 Solubility · 20 Water · 21

Question 21· Energy changes· JAMB
The combustion of 1 mol of methane releases 890 kJ. How much heat is released when 4 g of methane burns? (C = 12, H = 1)
Explanation and discussion
Question 22· Energy changes· JAMB
An exothermic reaction is one in which:
Explanation and discussion

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