GCSE CHEMISTRY: ENERGETICS (CUTDOWN). Trusted by students across multiple disciplines!

GCSE CHEMISTRY: ENERGETICS (CUTDOWN).
Trusted by students across multiple disciplines!
What is meant by the term endothermic? - Answer: A reaction in which heat energy is
taken in (surroundings get colder)


What is meant by the term exothermic? - Answer: A reaction in which heat energy is
given out (surroundings get hotter)


Explain why experimental values of enthalpy change differ from theoretical values -
Answer: Heat energy is lost to the surroundings. Not all the reactants are used up.


State the units of molar enthalpy change. - Answer: kj/mol


Are combustion reactions exothermic or endothermic? - Answer: Exothermic


Are displacement reactions exothermic or endothermic? - Answer: Exothermic


Are acid/alkali neutralisation reactions exothermic or endothermic? - Answer:
Exothermic


When a solid dissolves, is this process exothermic or endothermic? - Answer:
Endothermic


Draw a reaction profile for an exothermic reaction - Answer:


Draw a reaction profile for an endothermic reaction - Answer:




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