What mass of oxygen forms from 71.89 g CO2?
2 answers:
Answer:
52.28g
Explanation:
Given:
Mass of CO₂ = 71.89g
Solution:
The equation of the reaction:
CO₂ → C + O₂
We want to determine the mass of O₂ that will form from this reaction.
To do this, find the number of moles of CO₂:
Number of moles of CO₂ =
Molar mass of CO₂ = 12+ 2(16) = 44g/mol
Number of moles of CO₂ = = 1.63mole
From the equation of the reaction:
1mole of CO₂ will produce 1 mole of O₂
So 1.63 mole of CO₂ also produces 1.63mole of O₂
The mass of O₂:
Mass of O₂ = number of moles of O₂ x molar mass of O₂
Molar mass of O₂ = 2 x 16 = 32g/mol
Mass of O₂ = 1.63 x 32 = 52.28g
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Energy is transmitted to the surrounding in an exothermic reaction and this can be understood with the energy diagram of exothermic reaction attached with the answer.
<h3>What is an Exothermic Reaction ?</h3>
When a chemical reaction happens, energy is transferred to or from the surroundings.
When energy is transferred to the surroundings, this is called an exothermic reaction, and the temperature of the surroundings increases.
ΔH value negative –> energy released –> exothermic reaction
This happens because the reactants are at the higher energy state as compared to the products and therefore heat is liberated in the atmosphere to match the difference and therefore heat content in the surroundings increases.
The energy diagram for the exothermic reaction is attached with this answer.
To know more about exothermic reaction
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