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During a chemical reaction, energy is either absorbed or released. In an endothermic reaction, energy is absorbed to convert low-energy reactants into high-energy products. In an exothermic reaction, energy is released as high-energy reactants are transformed into low-energy products.
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Why is the activation energy of an endothermic reaction is at least as large as its enthalpy?
The activation energy of an endothermic reaction is at least as large as its enthalpy change because the reactants require a minimum amount of energy to reach the transition state where bond-breaking and bond-forming occur. The enthalpy change represents the overall energy difference between reactants and products but does not account for the energy needed to overcome the energy barrier (activation energy) for the reaction to proceed.
What profile best describes the reaction C plus 2H2 gives CH4 where delta H is minus 74.9 kJ per mol?
As this is an exothermic reaction, you would draw a line at a high level to represent the reactants, and one lower down for the products. The reaction path would be represented by a line which goes up from the reactants, curves over and goes down to the products.
How does temperature influence a chemical change?
Tempreture affects equilibrium in such a way dat when the tempreture of the reactants is high the rate of the foward reaction will be faster than the rate of backward reaction this is mainly due to the simple factor that when at high tempreture atom are at very high motion this there for increases there reactive factor .This also aplys to the products as they can also react to form reactants hence tempretures are kept constant or favouring the formation of desired products.
Arrangement of atoms at the peak of an energy barrier?
The arrangement of atoms at the peak of an energy barrier is known as a transition state. It represents the highest energy point in a chemical reaction where old bonds are breaking and new bonds are forming. Transition states are short-lived and have high energy compared to reactants and products.
What does a very high value of Keq indicate?
A very high value of Keq indicates that the reaction strongly favors the formation of products over reactants at equilibrium. This suggests that the reaction is proceeding nearly to completion and that a higher concentration of products is present compared to reactants at equilibrium.
When is rxn non spontaneous?
A reaction is considered non-spontaneous when the Gibbs free energy change (ΔG) is positive, indicating that the reaction requires an input of energy to occur. This could happen when the reactants have high energy relative to the products or when the reaction conditions do not favor the formation of products.
Why is the activation energy of an endothermic reaction is at least as large as its enthalpy?
The activation energy of an endothermic reaction is at least as large as its enthalpy change because the reactants require a minimum amount of energy to reach the transition state where bond-breaking and bond-forming occur. The enthalpy change represents the overall energy difference between reactants and products but does not account for the energy needed to overcome the energy barrier (activation energy) for the reaction to proceed.
What is transition state?
A transition state is a high-energy, unstable arrangement of atoms that occurs during a chemical reaction, representing the point at which reactants are transformed into products. It is characterized by the partial bonds that form and break as reactants move towards products. The transition state is often depicted in potential energy diagrams and is crucial in determining the activation energy required for a reaction to proceed. Its identification helps chemists understand reaction mechanisms and kinetics.
What does the statement a high equilibrium product constant mean?
A high equilibrium product constant indicates a higher concentration of products at equilibrium compared to reactants in a chemical reaction. This suggests that the reaction strongly favors product formation under the given conditions.
Which term describes the unstable arrangement of the reacting particles as the reaction takes place?
The term that describes the unstable arrangement of the reacting particles during a chemical reaction is the "transition state." This state represents a high-energy configuration where old bonds are partially broken and new bonds are partially formed, leading to the transformation of reactants into products. The transition state is critical in determining the reaction's activation energy and overall kinetics.
Does endothermic have high or low activation energy?
An endothermic reaction would not necessarily have either a high or low activation energy; it could be either and would depend on the reactants. Also, the activation energy alone does not determine if a reaction is endothermic or exothermic; a low or high activation energy could be part of an endothermic or exothermic reaction, again depending on the reactants.
What profile best describes the reaction C plus 2H2 gives CH4 where delta H is minus 74.9 kJ per mol?
As this is an exothermic reaction, you would draw a line at a high level to represent the reactants, and one lower down for the products. The reaction path would be represented by a line which goes up from the reactants, curves over and goes down to the products.
How does temperature influence a chemical change?
Tempreture affects equilibrium in such a way dat when the tempreture of the reactants is high the rate of the foward reaction will be faster than the rate of backward reaction this is mainly due to the simple factor that when at high tempreture atom are at very high motion this there for increases there reactive factor .This also aplys to the products as they can also react to form reactants hence tempretures are kept constant or favouring the formation of desired products.
Do The products CO2 and H20 contain more energy than does the reactant glucose?
they are they same. the products of photosynthesis are oxygen and glucose and the reactants of cellular respiration are gluose and oxygen.
What are the reactants and products in the processs of photosynthesis?
Photosynthesis uses the energy of sunlight to convert water and carbon dixode into high-engery sugers and oxygen.Recants-carbon dixode and waterProducts-high-energy sugars and oxygen
Arrangement of atoms at the peak of an energy barrier?
The arrangement of atoms at the peak of an energy barrier is known as a transition state. It represents the highest energy point in a chemical reaction where old bonds are breaking and new bonds are forming. Transition states are short-lived and have high energy compared to reactants and products.
What does a very high value of Keq indicate?
A very high value of Keq indicates that the reaction strongly favors the formation of products over reactants at equilibrium. This suggests that the reaction is proceeding nearly to completion and that a higher concentration of products is present compared to reactants at equilibrium.
