Bond energies (Edexcel GCSE Chemistry Combined Science): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What happens to bonds in every chemical reaction?
What happens to bonds in every chemical reaction?
Bonds are broken and new bonds form
In an endothermic reaction, how does energy to break bonds compare to energy released forming bonds?
In an endothermic reaction, how does energy to break bonds compare to energy released forming bonds?
Breaking bonds needs more energy
What is the sign of the overall energy change in an endothermic reaction?
What is the sign of the overall energy change in an endothermic reaction?
Positive
How do the surroundings feel during an endothermic reaction?
How do the surroundings feel during an endothermic reaction?
Cooler
In an exothermic reaction, how does energy released forming bonds compare to energy breaking bonds?
In an exothermic reaction, how does energy released forming bonds compare to energy breaking bonds?
Forming releases more energy
What is the sign of the overall energy change in an exothermic reaction?
What is the sign of the overall energy change in an exothermic reaction?
Negative
How do the surroundings feel during an exothermic reaction?
How do the surroundings feel during an exothermic reaction?
Warmer
What is the sign of energy when breaking bonds in calculations?
What is the sign of energy when breaking bonds in calculations?
Positive
What is the sign of energy when forming bonds in calculations?
What is the sign of energy when forming bonds in calculations?
Negative
If breaking bonds needs 500 kJ and forming bonds releases 800 kJ, what is the overall energy change?
If breaking bonds needs 500 kJ and forming bonds releases 800 kJ, what is the overall energy change?
kJ
If a reaction has a positive overall energy change, what type of reaction is it?
If a reaction has a positive overall energy change, what type of reaction is it?
Endothermic
If a reaction has a negative overall energy change, what type of reaction is it?
If a reaction has a negative overall energy change, what type of reaction is it?
Exothermic