Which of the changes will form more CaCO3 (more moles CaCO3)?
CO2 + Ca(OH)2=CaCO3 +H2O delta H =-113kJ
Write and explain if amount CaCO3 decrease, no change or increase with regards to the following situations:
a) Increase volume at constant temperature.
b)Increase partial pressure of CO2.
c.)Remove one half of the initial CaCO3.pls help
To determine which changes will result in the formation of more moles of CaCO3, we need to consider Le Chatelier's principle. This principle states that when a system at equilibrium is subjected to a change, it will try to minimize the impact of that change and restore the equilibrium.
a) Increase volume at constant temperature:
When the volume is increased, according to Le Chatelier's principle, the system will favor the reaction that produces fewer moles of gas to reduce the impact of the change. In this case, the forward reaction (CO2 + Ca(OH)2 -> CaCO3 + H2O) produces one mole of gas (CO2), while the reverse reaction (CaCO3 + H2O -> CO2 + Ca(OH)2) produces no gases. Therefore, by increasing the volume, the system will shift towards the reverse reaction, reducing the amount of CaCO3 formed.
b) Increase partial pressure of CO2:
Increasing the partial pressure of CO2 will shift the equilibrium towards the side of the reaction with fewer moles of gas to alleviate the increased pressure. In this case, the forward reaction produces one mole of gas (CO2), while the reverse reaction produces no gases. Thus, increasing the partial pressure of CO2 will favor the forward reaction, resulting in more CaCO3 being formed.
c) Remove one-half of the initial CaCO3:
Removing one-half of the initial CaCO3 from the reaction mixture will lead to a decrease in the concentration of the reactant. According to Le Chatelier's principle, when a reactant is removed, the system will try to compensate for the loss by favoring the forward reaction. This shift will result in the formation of more CaCO3 to restore the equilibrium.
In summary:
a) Increasing the volume at constant temperature will decrease the amount of CaCO3 formed.
b) Increasing the partial pressure of CO2 will increase the amount of CaCO3 formed.
c) Removing one-half of the initial CaCO3 will increase the amount of CaCO3 formed.