C7 Quiz - Energetics

Leah Firmstone
Quiz by Leah Firmstone, updated more than 1 year ago
Leah Firmstone
Created by Leah Firmstone almost 4 years ago
112
6

Description

GCSE Chemistry Quiz on C7 Quiz - Energetics, created by Leah Firmstone on 02/15/2016.

Resource summary

Question 1

Question
Reactions that give out energy - usually in the form of heat - are called...
Answer
  • ...exothermic reactions
  • ...endothermic reactions
  • ...redox reactions

Question 2

Question
Reactions that take in energy from the surroundings - usually in the form of heat - are called endothermic reactions.
Answer
  • True
  • False

Question 3

Question
What is 'activation energy'?
Answer
  • The overall energy change of a reaction.
  • The energy needed to start a chemical reaction.
  • A measure of the strength of a catalyst.

Question 4

Question
Breaking the chemical bonds in the reactants always [blank_start]requires[blank_end] energy – it is an endothermic process. [blank_start]Making[blank_end] new bonds in the products always releases energy – it is an exothermic process. If more energy is [blank_start]released[blank_end] when new bonds are made than was absorbed to [blank_start]break[blank_end] the bonds in the reactants, then the reaction is [blank_start]exothermic[blank_end]. If [blank_start]less[blank_end] energy is released when new bonds are made than was absorbed to break the bonds in the [blank_start]reactants[blank_end], then the reaction is [blank_start]endothermic[blank_end].
Answer
  • requires
  • Making
  • exothermic
  • endothermic
  • released
  • break
  • less
  • reactants

Question 5

Question
The diagram shows an endothermic reaction.
Answer
  • True
  • False
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