Exponents for rate laws

$\frac{d[R]}{dt}=-k[R]; \ln [R]=-kt + \ln [R]_{0}; t_{\frac{1}{2}}=\frac{0.693}{k}$

charlotte_jacobs_4I
Posts: 63
Joined: Fri Sep 28, 2018 12:29 am

Exponents for rate laws

What determines the exponent for rate laws, the coefficient (like in equilibrium), or the order?

timothy_ho_4B
Posts: 61
Joined: Fri Sep 28, 2018 12:29 am

Re: Exponents for rate laws

The coefficient only determines the exponent in an elementary step. The exponent of a rate law IS the order, but you find it by identifying the slow elementary step in a reaction and going from there.