AQA A Level Chemistry - Chapter 4:
Energetics comprehensive Questions and
Answers with Verified Solutions
Question 1:
What is a exothermic reaction
Answer:
gives out heat. is negative
Question 2:
what is a endothermic reaction
Answer:
takes in heat is positive
Question 3:
Define standard enthalpy of combustion
Answer:
The enthalpy change when 1 mole of a substance is burned completely in
oxygen under standard conditions
Question 4:
Define standard enthalpy of formation
Answer:
the enthalpy change when 1 mole of a substance is formed from its
elements under standard conditions.
Energetics comprehensive Questions and
Answers with Verified Solutions
Question 1:
What is a exothermic reaction
Answer:
gives out heat. is negative
Question 2:
what is a endothermic reaction
Answer:
takes in heat is positive
Question 3:
Define standard enthalpy of combustion
Answer:
The enthalpy change when 1 mole of a substance is burned completely in
oxygen under standard conditions
Question 4:
Define standard enthalpy of formation
Answer:
the enthalpy change when 1 mole of a substance is formed from its
elements under standard conditions.