energetics Flashcards
what is the temperature in standard conditions
298k
what is the pressure in standard constitions
100kPa
what is the concentration in standard conditions
1 mol dm^-1
what is the standard state in standard conditions
whatever state the substance is at the other standard conditions
what is the definition of standard enthalpy of the reaction
the enthalpy change that accompanies a reaction on the molar quantities specified in the chemical equation…
what does … mean after enthalpy change definitions on these flashcards
under standard conditions and with all reactants and products in their standard states
what is the definition of standard enthalpy change of formation
the enthalpy that takes place when one mole of a compound is formed from its elements…
what is the definition of standard enthalpy change of combustion
the enthalpy change that takes place when one mole of a substance reacts completely with oxygen …
what is the definition of standard enthalpy change of neutralisation
the enthalpy change that accompanies teh reaction of an acid and a base to form one mole of liquid water…
for enthalpy of formation hess cycle, what goes on the bottom of the cycle (alternate route)
individual elements
what way to the arrows go on a formation hess cycle
up
for combustion hes cycle, what goes on the bottom of the cycle (alternate route)
combustion products(CO2 + H2O)
what direction are teh arrows on a combustion hess cycle
down (towards CO2 +H2O)
what cancels out in combustion hess cycles
oxygen
in dissolving hess cycles, what is on the bottom of the cycle (alternate route)
something aqueous (thing before dot then water)
