energitic Flashcards
1
Q
enthalpy change
A
is the heat energy change at constant pressure
2
Q
standard enthalpy of combustion
A
the enthalpy change when 1 mole of substance is completed burned in oxygen
- under standard condition, under all substance in standard states
3
Q
enthalpy of formations
A
enthalpy change when 1 mol of compound is formed from its elements
-under standard condition , all substance standard states
4
Q
hess’s law
A
enthalpy change
in a reaction is independent of route taken and depend only on the intial and final states
5
Q
calculating combustion of values
A
reactant - product
6
Q
calculating the formation values
A
product - reactant =
7
Q
bond enthalpy
A
- bond broken - bond formed
8
Q
bond enthalpy
A
- bond broken - bond formed
9
Q
exothermic
A
negative value
10
Q
endothermic
A
positive value
