Which of the following statement is incorrect? (i) The standard enthalpy of reaction is the enthalpy change for a reaction when all the participating substances are in their standard states. (ii) The standard state of a substance at a specified temperature is its pure form at 1 bar. (iii) The standard state of solid iron at 298 K is pure iron at 1 atm (iv) Standard conditions are denoted by adding the superscript ominus to the symbol Δ H e . g .,-Δ H ominus

Question

Which of the following statement is incorrect? (i) The standard enthalpy of reaction is the enthalpy change for a reaction when all the participating substances are in their standard states. (ii) The standard state of a substance at a specified temperature is its pure form at 1 bar. (iii) The standard state of solid iron at 298 K is pure iron at 1 atm (iv) Standard conditions are denoted by adding the superscript ominus to the symbol Δ H e . g .,-Δ H ominus (A) (i) and (ii) (B) (ii) and (iii) (C) (iii) only (D) (iv) only

Tardigrade Admin · Accepted Answer

Standard state of solid iron at 298 K is pure iron at 1 bar. The standard conditions are denoted by adding the superscript ominus to the symbol Δ H e . g .,-Δ H ominus.

(i) and (ii)

(ii) and (iii)

(iii) only

(iv) only

Standard state of solid iron at 298K is pure iron at 1 bar. The standard conditions are denoted by adding the superscript ⊖ to the symbol ΔHe.g.,−ΔH⊖.

Standard state of solid iron at $298 K$ is pure iron at 1 bar. The standard conditions are denoted by adding the superscript $⊖$ to the symbol $Δ He . g ., - Δ H^{⊖}$ .