Consider the following problem:

Question

Target: 2NOCl (g) ¡æ N2 (g) + O2 (g) + Cl2 (g) ¥ÄHrxn= ?

Steps:

1. ¨ö N2(g) + ¨ö O2(g) ¡æ NO(g) ¥ÄH= 90.3 kJ

2. NO(g) + ¨ö Cl2(g) ¡æ NOCl(g) ¥Ä H= -38.6 kJ

As you determine the ¥ÄHrxn value for the target equation above, what must be done to step 2?

Question options:

a. Step 2 requires no change

b. Step 2 should be only multiplied by 2

c. Step 2 should be reversed and multiplied by 1/2.

d. Step 2 should be reversed and multiplied by 2.

e. Step 2 should be only reversed