# Chemistry Urgent

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Consider the following problem:

Target: 2NOCl(g) ? N2(g)+ O2(g)+Cl2 (g) ?Hrxn= ?

Steps:

1. 1/2 N2(g) + 1/2 O2(g)? NO(g) ?H= 90.3 kJ

2. NO(g) + 1/2 Cl2(g) ? NOCl(g) ?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

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