Question #41369
The standard enthalpy of formation for which of the following is zero :-
(1) CH3OH(ℓ)
(2) HF(g)
(3) H2O(ℓ)
(4) F2(g)
(1) CH3OH(ℓ)
(2) HF(g)
(3) H2O(ℓ)
(4) F2(g)
Expert's answer
The standard enthalpy of formation of a compound is the change of enthalpy from the formation of 1 mole of the compound from its constituent elements, with all substances in their standard states at 1 atmosphere (1 atm or 101.3 kPa).
All elements in their standard states (oxygen gas, solid carbon in the form of graphite, etc.) have a standard enthalpy of formation of zero, as there is no change involved in their formation.
So, the standard enthalpy of formation of F2(g) is zero.
Answer: 4) F2(g)
All elements in their standard states (oxygen gas, solid carbon in the form of graphite, etc.) have a standard enthalpy of formation of zero, as there is no change involved in their formation.
So, the standard enthalpy of formation of F2(g) is zero.
Answer: 4) F2(g)
