Posted by **Anonymous** on Sunday, October 6, 2013 at 5:39pm.

When we combine the three gas laws into one expression:

V is directly proprtional to T

P is directly propetional to T ---------> PV is directly proprtional to T

P is inversely proportional to 1/V

PV/T= constant

*******I do not understand how PV is directly proportional to T and how PV/T= constant. Is there a mathematical manipulation or something? Please explain.

- CHEMISTRY -
**bobpursley**, Sunday, October 6, 2013 at 5:56pm
PV=nRT replacing nR with c,a constant, then PV=cT

so PV is directly proportional to T

for part 1, divide

PV=cT by T

PV/T=constant

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