Standard Conditions (T=298.15 K P=1 atm)

Standard Temperature and Pressure (T=273.15 K P=1 atm)

Degree K

Degree C

standard enthalpy of formation

standard enthalpy ofhydration

electron affinity

standard enthalpy of atomisation

Standard enthalpy of neutralisation, ΔH_neut^o

Standard enthalpy of solution, ΔH_soln^o

Standard enthalpy of hydration, ΔH_hyd^o

lattice energy, ΔH_lattice^o

Heat released when one mole of substance is burnt completely in excess oxygen.

Heat absorbed when one mole of substance is burnt completely in excess oxygen under standard state.

Heat released when one mole of substance is burnt completely in excess oxygen under standard state.

Heat change when one mole of substance is burnt partially in excess oxygen under standard state.

Br₂(g)

N(g)

CO(g)

N₂(g)

Na(g) ---> Na⁺(g) + e^- ΔH = -364 kJmol^-1

C₂H₅OH(l) + 3O₂(g) ---> 2CO₂(g) + 3H₂O (l) ΔH = - 1286 kJmol^-1

2C(s) + 2H₂(g) ---> C₂H₄ (g) ΔH = - 52.3 kJmol^-1

Na⁺(g) ---> Na⁺(aq) ΔH = - 364 kJmol^-1