WAEC (WASSCE) Chemistry · Solutions, energy and chemical change
Energy and energy changes: WAEC Chemistry Past Questions and Answers
What the WAEC syllabus covers in Energy and energy changes
Our summary: Energy and enthalpy, and the heat given out or taken in when substances react, dissolve or are neutralised.
- Energy and enthalpy (Explanation of the terms energy and enthalpy. Energy changes associated with chemical processes.)
- Description, definition and illustrations of energy changes and their effects ((1) Exothermic and endothermic processes. (2) Total energy of a system as the sum of various forms of energy e.g. kinetic, potential, electrical, heat, sound etc. (3) Enthalpy changes involved in the following processes: combustion, dissolution and neutralization.)
Syllabus content © The West African Examinations Council (WASSCE (harmonised West African syllabus)).
WAEC (WASSCE) Chemistry questions on Energy and energy changes
- WAEC 2023Consider the following reaction equation: 2SO 3(g) → 2SO 2(g) + O 2 (g) ∆H = +198 kJ/mol Which of the following statements about the reaction is correct?
- WAEC 2020Which of the following reactions are always exothermic? 1. Neutralization Il. Decomposition III. Combustion
- WAEC 2020Which of the following standard conditions is not correct about energy changes?
- WAEC 2019which of the following pairs of substances has the highest heat of neutralization?
- WAEC 2019If the value of ΔH is positive for a reaction, it means that the reaction is?
- WAEC 2019When quicklime dissolves in water?
- WAEC 2018A reaction is endothermic if the
- WAEC 2017Petroleum is a non-renewable source of energy because it
- WAEC 2017When Magnesium reacts with oxygen, heat is
- WAEC 2017Which of the following statements about endothermic reaction is correct?
- WAEC 2016When NH4Cl(s) is dissolved in water, the container feels cold to touch. This implies
- WAEC 2015When a reaction is endothermic,
- WAEC 2014The type of energy changes that accompany the mixing of a strong acid to a strong base is
- WAEC 2013When heat is absorbed during a chemical reaction, the reaction is said to be
- WAEC 2012MgO does not readily dissolve in water because
- WAEC 2012The energy evolved when magnesium burns in air is in the form of
- WAEC 2011When NH 4CI was dissolved in water, the container was cold to touch. This implies that
- WAEC 2011Which of the following statements about enthalpy of neutralization is correct? It
- WAEC 2010The determination of heat of combustion is carried out with
Years with Energy and energy changes questions in DeeepSolve's question bank
From the past questions DeeepSolve holds, not a count of everything the exam body has set.
- 2023
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