Question

Consider the chemical reaction,
OF₂ (g) +H₂O (g) → O₂ (g) + 2HF (g), ΔH°
=-323 kJ

What is ΔH° of the reaction if (a) the equation is multiplied by 3 (b) direction of reaction is reversed?

Answer 1

the reaction in the multipled by 3 equations

Answer 2

Answer:

ΔH° of the reaction if,

(a) The equation is multiplied by 3 then , enthalpy change also become thrice.

(b) direction of reaction is reversed then sign of ΔH° is changed.

Explanation:

Since we know that ΔH° is the enthalpy change which is the function of specific heat and change in temperature.It happens at a constant pressure.

(1)If given equation is multiplied by 3 ,then  ΔH° enthalpy change is also becomes thrice the initial value as it depends upon coefficient of reactant and products.

(2)If the direction of reaction is reversed then the sign of enthalpy change get changed from negative to positive.