Answer to Question #212477 in Organic Chemistry for Cool

Question

Given the following thermochemical equations, calculate the change in enthalpy for the

formation of one mole of dinitrogen pentoxide from its elements in their stable state at

25°C and 1 atm.

(A) 2H_2(g)+O_2(g) -> 2H₂O_(l) ΔH= -571.6 kJ

(B) N₂O_5(g)+H₂O_2(l) -> 2HNO_3(l) ΔH= -73.7 kJ

(C) 1/2N_2(g)+3/2O_2(g)+1/2H_2(g) -> HNO_3(l) ΔH= -174.1 kJ

Answer 1

A standard enthalpy change of reaction equal to

a) $-367.2kJ$

b) $-37.4kJ$

c) $73.8kJ$