Standard enthalpy changes Flashcards
1
Q
To be able to compare the changes in enthalpy between reactions, all thermodynamic measurements are carried out under
A
standard conditions
2
Q
To be able to compare the changes in enthalpy between reactions, all thermodynamic measurements are carried out under standard conditions
These standard conditions are
A
A pressure of 100 kPa (you may see some older exam questions that use a figure of 101 kPa;
A temperature of 298 K (25 oC)
Each substance involved in the reaction is in its standard physical state (solid, liquid or gas)
3
Q
To show that a reaction has been carried out under standard conditions, the symbol ……….is used
A
Ꝋ
4
Q
ΔHꝊ =
A
the standard enthalpy change
