hello, can anyone help me in this, please:
i'm giving general rate equation as follows:
dw/dt=A(1-w)n exp(-Ea/RT)
where w is the fractional weight loss of a polymer sample at time t (0<=w<=1 ), is the decomposition rate (or weight loss) rate (min-1), T is the absolute temperature at time t (K), Ea is the activation energy (J/mol), R is the gas constant (8.314 J/mol.K), A is the frequency factor and n is the decomposition reaction order.
i have some sample data for T and with the corresponding w, dw/dt values.
Where the required are to find n, Ea, and A.
My question is that are these values (Ea, n and A ) are constants over the problem or they are change dynamically in same sort of equation that related to T?!
Thanks in advance.