398 
the explosion products. We may employ the Kistiakowsky-Wilson4/ equation 
of state, 
Bx 
pip = nRT (it xe ) 
Me (2.8) 
= te (o T 
ea ae 
where yn is the total number of moles of products per gram of explosive, 
k is an empirical parameter characteristic of the i-th constituent with 
dimensions of volume which can be called a covolume, and & and P are 
empirical constants, Then 
V/ x 
‘ Gy) = Nik eee 
(2.9) 
We may represent with adequate accuracy the mean heat capacity as a linear 
function of T in the form 
oat, auc 
(2.10) 
where A ' and B, are constants characteristic of the i-th constituent, 
With Eqs. 2,9 and 2.10, Eq. (2.7) can be written in the form 
pr 
— é 
en; = (Xn;A; + Te 20,8) (T.-7,) + kT Az, € b eel@sa) 
which can be solved numerically for the temperature T, of the adiabatic 
constant volume explosion state if the composition of the products is 
A a 
known. The pressure Pe corresponding to temperature T, and a A 
can then be determined at once from the equation of state. The specific 
v3 
entropy S@, T) is given by ue 
See (aD) = Zn: ot ie = R2n, tog nell mG} - nia idv, 
l2 
