Exothermic and Endothermic Reactions (Grade 11 NSC Matric Physical Sciences): Quizzes
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Practise the questions
10 questions from this quiz
What is the sign of for an exothermic reaction?
What is the sign of for an exothermic reaction?
Negative
In an endothermic reaction, how do the energy levels of reactants and products compare?
In an endothermic reaction, how do the energy levels of reactants and products compare?
Reactants < Products
What is the formula for calculating ?
What is the formula for calculating ?
What happens to the surroundings during an exothermic reaction?
What happens to the surroundings during an exothermic reaction?
They become warmer
In an energy profile diagram for an endothermic reaction, where are the products positioned?
In an energy profile diagram for an endothermic reaction, where are the products positioned?
Higher energy level than reactants
For an exothermic reaction, where is energy written when using Method 2 for chemical equations?
For an exothermic reaction, where is energy written when using Method 2 for chemical equations?
As a product (right side)
Which substances produce exothermic reactions when dissolved in water?
Which substances produce exothermic reactions when dissolved in water?
and
Which substances absorb heat when dissolved in water?
Which substances absorb heat when dissolved in water?
and
Which of these is an everyday example of an exothermic process?
Which of these is an everyday example of an exothermic process?
Combustion reactions
What is the difference between activation energy and ?
What is the difference between activation energy and ?
Activation = barrier height; = energy difference