There are many organic organic compounds which tends to reacts with Br₂. Specifically speaking two classes of organic compounds are very well known for their reaction with Br₂. Those two classes are alkenes and alkynes. Both belongs to unsaturated hydrocarbons.
This reaction of Unsaturated Hydrocarbons with Br₂ are generally used for the identification of Unsaturation.
Examples:
H₂C=CH₂ + Br₂ → Br-CH₂-CH₂-Br
In above reaction Ethene on reaction with Br₂ produces 1,2-Dibromoethane. In this reaction the color of Br₂ (yellow-brown) disappears as the reaction proceeds.
HC≡CH + 2 Br₂ → Br₂HC-CHBr₂
In this reaction acetylene (alkyne) reacts with two moles of Br₂ to produce 1,1,2,2-Tetrabromoethane.
Hence, every alkene and alkyne for example, Ethene, 1-Butene, 2-Butene 1-Pentene, 2-Pentene, Acetylene, 1-Butyne, 2-Butyne, 1-Pentyne, 2-Pentyne, e.t.c can react with Br₂.
Volume of carbon dioxide absorbed = 33.6 L ≈ 34 L
Explanation:
We have the following chemical reaction:
CO₂ (g) + 2 LiOH (s) → Li₂CO₃ (s) + H₂O (l)
Now we devise the following reasoning:
if 1 mole of carbon dioxide reacts with 2 moles of lithium hydroxide
then X moles of carbon dioxide reacts with 3 moles of lithium hydroxide
X = (1 × 3) / 2 = 3/2 moles of carbon dioxide
And we calculate the volume of carbon dioxide using the following formula:
number of moles = volume / 22.4
volume = number of moles × 22.4
note: units for 22.4 are "L / mole"
volume of carbon dioxide = (3/2) × 22.4 = 33.6 L ≈ 34 L
Learn more about the reaction of carbon dioxide with metal hydroxides:
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A reaction that is spontaneous will always happen. Option D is right.
Explanation:
When certain conditions for reactions are fulfilled the reaction that occurs without any outside intervention with the formation of product is called as spontaneous reaction.
In spontaneous reaction the product is of lesser energy than reactants.
The spontaneous reaction leads to increase in entropy. If the entropy of the system and surrounding is positive the reaction is spontaneous.
During phase change as solid to liquid causes molecules to be disordered and increase in the movement causes increase disorder hence increase in entropy and a spontaneous reaction.
In chemical reactions if on mixing the substances heat is released thus entropy increases. The spontaneous reaction can also occur even if entropy decreases.
The reaction is not spontaneous if Gibb's free energy is negative.
The answer is helium because
Mass. The mass stays the same no matter what form it is in.