Answers

2016-03-14T16:55:40+08:00
The difference between before and after shaking thepressure exerted by the denutured alcohol molecules is that before shaking the pressure vapor decreases, but when after shaking or shaken the vapor increase.

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2016-03-15T08:55:12+08:00
The pressure exerted by molecules of denatured alcohol after shaking is greater than before shaking because shaking aids the molecules to escape to break the bonds that holds them, so as the bonds are broken each molecules are free and are able to move and exert pressure as gaseous molecuels 
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