During a reaction 24 cubic cm of carbon dioxide was given off. After 8 minutes no more gas was produced and the reaction was com
2 answers:
Answer:
Explanation:
Given parameters:
Volume of CO₂ = 24cm³
time taken for the reaction to complete = 8minutes.
Unknown:
rate of reaction
Soution
The reaction rate is a measure of speed of a chemical reaction. It is often calculated using the expression below:
Reaction rate =
Reaction rate = = 3cm³/min
In this reaction, 3cm³ of carbon dioxide were produced per minute
Answer:
Rate of the reaction = 3cm³/min
Explanation:
The rate of a reaction is essentially the speed at which the reaction proceeds. It is expressed in terms of the amount of reactants consumed or the amount of product formed.
Mathematically, it is the ratio of the change in concentration over a certain time period.
For the given reaction the initial concentration of carbon-dioxide = 0
Final concentration = 24 cm³
Change in concentration = Final - initial = 24 cm³
Time period = 8 min
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Answer:
1. Exothermic.
2. -1598 kJ.
Explanation:
Hello!
1. In this case, according to the reaction, we can infer that 799 kJ of energy are evolved (given off, released) it means that the enthalpy of reaction is negative as the reactants have more energy than the products; which means this is an exothermic reaction.
2. Here, as we know that the enthalpy of reaction is -799 kJ/mol, we can compute the q-value as shown below, considering the reacted 2 moles of solid iron:
Which means that 1598 kJ of energy are evolved when 2 moles of solid iron react.
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