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3.1.4.1 Enthalpy Change
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Total cards: 6•Content version: v3•Public deck•Updated: 8/1/2026
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#1
Front (Question)
Define standard enthalpy change of combustion
Back (Answer)
The enthalpy change when one mole of substance is completely burnt in oxygen under standard conditions
#2
Front (Question)
Define standard enthalpy change of formation
Back (Answer)
The enthalpy change when one mole of substance is formed from its elements with all reactants and products in their standard state
#3
Front (Question)
What is enthalpy change?
Back (Answer)
The heat energy change measured under conditions of constant pressure
#4
Front (Question)
What is an endothermic reaction?
Back (Answer)
A reaction that takes in energy
#5
Front (Question)
What is an exothermic reaction?
Back (Answer)
A reaction that releases energy
#6
Front (Question)
In experiments measuring the enthalpy change of reactions involving gases, what conditions must be kept constant?
Back (Answer)
Pressure