Question

2 NO(g) + 2 H2(g) --> N2(g) + 2 H2O(g)

Reactant Concentration(mol/L) and
Rate of Appearance of N2
[NO] [H2] (mol/L·s)
0.420 0.122 0.136
0.210 0.122 0.0339
0.210 0.244 0.0678
0.105 0.488 0.0339

What is the rate constant?

Answer 1

Here is what you need to do.
1. Determine order for NO.
2. Determine order for H2.
3. Determine k
rate = k(NO)^x(H2)^y
For the order of NO, divide equation 1 by 2. I get the order to be 2 for NO.
For the order of H2, divide equation 2 by 3. I get the order to be 1 for H2.
3. Use any equation, substitute rate, (NO) and (H2) and solve for k.