Table 2. Experimental (Exp) and theoretical (Theor) FRQ degradation rate constant values at 20°C and 25°C.

	FRQ1		FRQ+		FRQ7		FRQS5131
	Exp	Theor	Exp	Theor	Exp	Theor	Exp	Theor
k (20°C)*, h-1	0.27	0.33	0.22	0.21	0.16	0.13	0.08	0.09
k (25°C)*, h-1	0.33	0.41	0.27	0.26	0.22	0.18	0.12	0.13
Ea (kJ/mol)	29		30		46		59

^*The theoretical k values at 20°C and 25°C are calculated from the (theoretical) k₅ (=k₆) FRQ degradation rate constants given in Table 1 by using the experimentally determined activation energies E_a and Eq. 1.