Enthalpy AS Review

Last updated about 1 year ago

3 questions

know that standard conditions are _______  kPa and a specified temperature, usually _______  K 

know that the enthalpy change is the heat _______  change measured at constant _______  

be able to construct and interpret enthalpy level diagrams showing an enthalpy change, including appropriate signs for exothermic (_______) and endothermic (_______) reactions 

Note: Activation energy is not shown in _______  level diagrams but it is shown in reaction profile diagrams.

Enthalpy change calculation using enthapy of formation.
sign_______ value_______ 

Enthalpy AS Review

Last updated about 1 year ago

3 questions

Year 12 Enthalpy Specification points

Draggable item		Corresponding Item
Standard enthalpy change of reaction:		Enthalpy change when reaction occurs in the molar quantities shown in the chemical equation under standard conditions.
Standard enthalpy change of formation:		Enthalpy change when 1 mole of a compound is formed from its elements in their standard states under standard conditions.
Enthalpy change:		Enthalpy change when 1 mole of a substance is completely burned in oxygen under standard conditions.
energy transferred =		Enthalpy change when an acid and alkali react together under standard conditions to form 1 mole of water.
Standard enthalpy of combustion:		Heat energy change in a reaction at constant pressure (kJmol-1)
Standard conditions:		100 kPa, 298 K, 1 moldm −3 concentrations of ions. (Note not 1atm)
Standard enthalpy of neutralisation:		mass x specific heat capacity × temperature change

know that standard conditions are _______  kPa and a specified temperature, usually _______  K 

know that the enthalpy change is the heat _______  change measured at constant _______  

be able to construct and interpret enthalpy level diagrams showing an enthalpy change, including appropriate signs for exothermic (_______) and endothermic (_______) reactions 

Note: Activation energy is not shown in _______  level diagrams but it is shown in reaction profile diagrams.

Enthalpy change calculation using enthapy of formation.
sign_______ value_______ 