When a reaction system is at equilibrium: a. there is no more chemistry happening. b. the amounts of reactants and products are
1 answer:
Answer: Option (e) is the correct answer.
Explanation:
Equilibrium is defined as the state of a chemical reaction in which the rate of forward reaction is equal to the rate of backward reaction.
The state of equilibrium is represented by a double sided arrow as "" in a chemical equation.
For example,
Therefore, we can conclude that when a reaction system is at equilibrium then the rates of the reaction in the forward and reverse directions are exactly equal.
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Taking into account the definition of calorimetry and latent heat, a heat of 2159.5 J is needed to melt 35 g of iodine.
<h3>Calorimetry</h3>Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.
<h3>Latent heat</h3>Latent heat is defined as the energy required by a quantity of substance to change state.
When this change consists of changing from a solid to a liquid phase, it is called heat of fusion and when the change occurs from a liquid to a gaseous state, it is called heat of vaporization.
The heat Q that is necessary to provide for a mass m of a certain substance to change phase is equal to
Q = m×L
where L is called the latent heat of the substance and depends on the type of phase change.
<h3>Heat needed to melt iodine</h3>In this case, you know:
- m= 35 g
- L=61.7
Replacing in the definition of latent heat:
Q= 35 g× 61.7
Solving:
<u><em>Q=2159.5 J</em></u>
Finally, a heat of 2159.5 J is needed to melt 35 g of iodine.
Learn more about calorimetry:
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