Comments on: How to find the volume of oxygen gas collected in water decomposed? http://blog.hybridcargurus.com/chemistry/how-to-find-the-volume-of-oxygen-gas-collected-in-water-decomposed/ hybrid car technology, price, battery and comparison Thu, 28 Jan 2010 16:00:15 +0000 http://wordpress.org/?v=2.9.1 hourly 1 By: Kevin http://blog.hybridcargurus.com/chemistry/how-to-find-the-volume-of-oxygen-gas-collected-in-water-decomposed/comment-page-1/#comment-1705 Kevin Wed, 15 Apr 2009 21:42:35 +0000 http://blog.hybridcargurus.com/chemistry/how-to-find-the-volume-of-oxygen-gas-collected-in-water-decomposed/#comment-1705 Let's first balance the equation... 2H2O -> 2H2 + O2 Then let's convert 1g of H2O to moles of H2O... 1.00g H2O x (1 mole ) ..........1........(18.01g ) = .05552471 moles H2O Then let's use the ideal gas equation to find the answer PV = nRT P = 1.00 atm V = ? n = .05552471 moles H2O R = .0821 T = 25 degrees Celsius (or 298 K) V = nRT ........P V = (.05552471)(.0821)(298) .................1.00 atm Volume (V) = 1.35845641 Liters Rounded to 3 sig figs: 1.36 Liters

Let’s first weigh the equation…

2H2O -> 2H2 + O2

Then let’s convert 1g of H2O to moles of H2O…

1.00g H2O x (1 mole )
……….1……..(18.01g )
= .05552471 moles H2O

Then let’s use the ideal gas equation to find the pledge

PV = nRT

P = 1.00 atm
V = ?
n = .05552471 moles H2O
R = .0821
T = 25 degrees Celsius (or 298 K)

V = nRT
……..P

V = (.05552471)(.0821)(298)
……………..1.00 atm

Number (V) = 1.35845641 Liters

Rounded to 3 sig figs: 1.36 Liters

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