•
or P
1/V and V
1/P
•
PV = k
1
where k
1
is a proportionality
constant that is
•
•
•
•
P
i
V
i
= k
1
and P
f
V
f
=k
1
so
•
P
i
V
i
= P
f
V
f
at the same temp and no.moles
of gas