Science Buddies: "Ask an Expert"

Dear sir,
I have an idea for my idea I need some data ,is there any chemicals compounds which breaks at 340k and combines at 290k when they combine they should be liquid and when they break they should be gases.
Please mention some data or links

Do you have access to a CRC (Chemical Rubber Company) handbook? This book shows the physical properties, including the ones you are interested in, of thousand and thousands of chemicals.

http://www.hbcpnetbase.com/

Cheers,
Colin