Question-Alkenes react with hydrogen gas in the presence of a nickel catalyst.
0.2 mol of an alkene reacted completely with 19.2 dm3 of hydrogen gas at room
temperature and pressure.
How many carbon carbon double bonds are there in a molecule of this alkene?
[The molar volume of a gas is 24.0 dm3 mol–1 at room temperature and pressure]
How do I solve this???
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- Thread Starter
- 24-02-2018 03:40
- Official Rep
- 26-02-2018 06:16
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- 26-02-2018 19:13
Wow, this one is difficult O_o C2H4 + H2 --> C2H6 So the one double bond in a mole of C2H4 is broken by one mole of hydrogen gas One mole of any gas at room temp and pressure is 24dm3 So 1 mol alkene with n c=c bonds reacts with n * 24dm3 of hydrogen gas 0.2mol * 24dm3 * N = 19.2dm3 x 1 so N = 19.2 * 1 / (24*0.2) = 4 So there is 4 c=c bonds in this alkene.Last edited by username3709354; 26-02-2018 at 19:16.