Exothermic and Endothermic Reactions (Leaving Cert Chemistry): 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 the temperature of the surroundings during an exothermic reaction?
What happens to the temperature of the surroundings during an exothermic reaction?
It increases
What is the sign of for an exothermic reaction?
What is the sign of for an exothermic reaction?
Negative
What is the sign of for an endothermic reaction?
What is the sign of for an endothermic reaction?
Positive
What happens to surroundings' temperature during an endothermic reaction?
What happens to surroundings' temperature during an endothermic reaction?
It decreases
Which type of reaction is the combustion of methane?
Which type of reaction is the combustion of methane?
Highly exothermic
Why does dissolving ammonium nitrate in water feel cold?
Why does dissolving ammonium nitrate in water feel cold?
It's an endothermic process
Heat of combustion is heat released when how many moles of substance are burned?
Heat of combustion is heat released when how many moles of substance are burned?
One mole
Which instrument measures the heat of combustion accurately?
Which instrument measures the heat of combustion accurately?
Bomb calorimeter
What does bond energy measure?
What does bond energy measure?
Energy to break 1 mole of a covalent bond
How much energy is needed to break all four bonds in one mole of methane?
How much energy is needed to break all four bonds in one mole of methane?
kJ
According to Hess's Law, what is true about total enthalpy change?
According to Hess's Law, what is true about total enthalpy change?
It is the same regardless of pathway
Heat of formation is the enthalpy change when how many moles of compound are formed?
Heat of formation is the enthalpy change when how many moles of compound are formed?
One mole