The equation for the equilibrium between nitrogen and oxygen may be written intwo ways.
N2(g) + O2(g) <=> 2NO(g)
½N2(g) + ½O2(g) <=> NO(g)
The standard enthalpy change for the reaction as shown in the first equation is+180 kJ mol–1.
What is the standard enthalpy change for the reaction as shown in the secondequation?
A +45 kJ mol–1
B +90 kJ mol–1
C +180 kJ mol–1
D +360 kJ mol–1
I thought it was C as the answer is in the unit of per mole. But the correct answer is B.
Can someone please enlighten me?